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Re: How does whatsapp work?

From "Carlos E.R." <robin_listas@es.invalid>
Newsgroups comp.mobile.android
Subject Re: How does whatsapp work?
Date 2026-09-01 09:44 +0200
Organization Tebibyte_Retro_Gaming
Message-ID <rccimmxadf.ln2@Telcontar.valinor> (permalink)
References <n1ua9ltc3losq5kj0lfkh8lim4t3bp4npf@4ax.com> <q8ugmmxu97.ln2@Telcontar.valinor> <uemc9lds27afsbl4ruv5bl6bfd9hq07lcn@4ax.com>

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On 2026-09-01 07:01, micky wrote:
> In comp.mobile.android, on Mon, 31 Aug 2026 20:37:46 +0200, "Carlos
> E.R." <robin_listas@es.invalid> wrote:
> 
>> On 2026-08-31 15:01, micky wrote:
>>> How does whatsapp work?
>>>
>>> I'm uncertain because aiui people dont enroll in whatsapp.  They dl the
>>> app and then use it.  Does this first use form some kind of enrollment?
>>> I ask because I've used my contact list to tell if somoene has whatspp
>>> installed or not.  Is it accurate to do that?
>>>
>>>     If you call and no one answers, you can't leave a voice message but I
>>> thnk it now offers to let you send a text.
>>>     If you call and the phone is off, does the same thing happen, offers
>>> to let you send a text?
>>>     More imporrtantly, whether you tried to call or not, if the phone is
>>> off, can you send and they receive a text when they next turn the phone
>>> on?
>>>     Their whatsapp number will always appear in your contact list??  Even
>>> if the phone is off, if they have ever used whatsapp?
>>>
>>> OTOH, one can tell if they have it installed because in my contact list,
>>> if they do, there will be a whatsapp number and if they don't there will
>>> not be one?  Wait, that would probably only work if their whatsapp
>>> number is the same as their cell number. Do you see why I'm befuddled?
>>
>> If a contact appears inside WhatsApp, then that phone has WhatsApp
>> working. That's authoritative information. However, that person may
>> ignore WhatsApp.
> 
> Of course
> 
>> You can send a WA message anytime. The other phone can be off or on, the
>> message is stored and forwarded when turned on.
> 
> Very, very good to know.

Huh, though, I don't know if there is a timeout limit.

> 
>> The WA number is always the real phone number.
> 
> Well, when I travel I usually get  a local sim, and until this most
> recent phone, I could only have one sim at a time, so my cell phone
> number was different from my whatsapp number. I don't know if this is
> contradictory to what you just said or not.   In 2022 and maybe also
> 2019.

That maybe a glitch. Or a provision for those that are visiting another 
country, and works until a check is done; like, you want to migrate to 
another phone.


> 
>> However, since recently
>> you can define an alias and use that instead.
> 
> I didn't define an alias.  It just worked out that way.

It is a new feature. I have not looked into it.

> 
>> If someone doesnot have whatsapp, and you try to message that person, WA
>> will offer to send him an invitation.
> 
> Oh, of course.  I once knew that.  I have an American friend who with
> his wife frequently takes cruises, one within the Mediterranean, but he
> doesn't have parents or children, and I guess he has no need to call
> anyone back home, and since it's a cruise, they don't meet many people
> who are local that he might want to call when he's back home.  I guess
> that's why he does't have it.  I've called him once when I saw something
> I thought he would find very interesting.
> 
>> I don't remember what happens the first time you use WA, long ago, but
>> yes, that counts as enrollment.
> 
> Good enough.  YOuu have answered most or all of my questions and Maria
> answered one I didn't even know I had.  Thanks you both.

Arlen (aka Maria) does not use the Android Contact List.

-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Thread

How does whatsapp work? micky <NONONOmisc07@fmguy.com> - 2026-08-31 09:01 -0400
  Re: How does whatsapp work? Maria Sophia <mariasophia@comprehension.com> - 2026-08-31 09:20 -0600
    Re: How does whatsapp work? micky <NONONOmisc07@fmguy.com> - 2026-09-01 00:51 -0400
  Re: How does whatsapp work? "Carlos E.R." <robin_listas@es.invalid> - 2026-08-31 20:37 +0200
    Re: How does whatsapp work? micky <NONONOmisc07@fmguy.com> - 2026-09-01 01:01 -0400
      Re: How does whatsapp work? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-01 09:44 +0200
    Re: How does whatsapp work? "s|b" <me@privacy.invalid> - 2026-09-01 12:47 +0200
      Signal (was: Re: How does whatsapp work?) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-01 12:21 +0100
        Re: Signal (was: Re: How does whatsapp work?) "s|b" <me@privacy.invalid> - 2026-09-01 16:30 +0200
          Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 19:15 +0200
            Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-01 19:32 +0200
              Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 21:25 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-01 21:26 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 21:53 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 11:20 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 17:10 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 20:37 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 21:23 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:36 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:31 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 22:32 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 02:40 +0530
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 23:24 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 11:39 +0845
                [OT/Meta] Trolling (was: Re: Signal) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-03 11:37 +0100
                Re: [OT/Meta] Trolling Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 03:43 +0930
                Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-03 11:28 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 02:31 +0930
                [OT] "trolling" (was: Re: Signal) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-02 11:18 +0100
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 17:10 +0200
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 20:25 +0200
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:28 +0200
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 22:33 +0200
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 02:41 +0530
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 23:25 +0200
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 11:35 +0845
                Re: [OT] "trolling" Chris <ithinkiam@gmail.com> - 2026-09-09 20:07 +0000
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-10 09:27 +0200
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 20:24 +0200
                Re: [OT] "trolling" Frank Slootweg <this@ddress.is.invalid> - 2026-09-02 18:56 +0000
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 21:18 +0200
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:38 +0200
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:27 +0200
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 22:33 +0200
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 05:58 +0845
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 23:25 +0200
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 11:36 +0845
            Re: Signal Andy Burns <usenet@andyburns.uk> - 2026-09-01 18:59 +0100
              Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 21:18 +0200
            Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-02 11:11 +0100
              Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 17:18 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 20:28 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 21:25 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:38 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:32 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 23:00 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 02:39 +0530
        Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 19:05 +0200
          Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-01 19:13 +0200
            Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 20:52 +0200
              Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-01 21:27 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 21:50 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 11:20 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 17:11 +0200
                Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-02 18:50 +0100
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 20:30 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 21:34 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:51 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:34 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 23:00 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 06:00 +0845
                Re: Signal Andy Burns <usenet@andyburns.uk> - 2026-09-03 09:42 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 03:13 +0930
                [OT] "trolling" (was: Re: Signal) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-04 13:12 +0100
                Re: [OT] "trolling" (was: Re: Signal) micky <NONONOmisc07@fmguy.com> - 2026-09-08 21:04 +0300
                Re: [OT] "trolling" (was: Re: Signal) Jim Jackson <jj@franjam.org.uk> - 2026-09-08 19:32 +0000
                Re: [OT] "trolling" (was: Re: Signal) micky <NONONOmisc07@fmguy.com> - 2026-09-09 08:21 +0300
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 21:31 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:51 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:27 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 22:34 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 02:37 +0530
                Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-03 11:55 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 02:44 +0930
                [OT] "trolling" (was: Re: Signal) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-04 12:39 +0100
                Re: Signal micky <NONONOmisc07@fmguy.com> - 2026-09-09 08:44 +0300
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-04 09:56 +0200
                [OT] "trolling" (was: Re: Signal) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-06 10:17 +0100
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-06 13:59 +0200
                Re: [OT] "trolling" Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-06 13:34 +0100
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-06 20:07 +0200
                Re: [OT] "trolling" micky <NONONOmisc07@fmguy.com> - 2026-09-09 08:51 +0300
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-09 12:49 +0200
                Contacts AJL <noemail@none.com> - 2026-09-09 09:55 -0700
                Re: Contacts Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-10 10:16 +0100
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-10 09:30 -0700
                Re: Contacts AJL <noemail@none.com> - 2026-09-10 17:49 +0000
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-10 21:33 -0700
                Re: Contacts AJL <noemail@none.com> - 2026-09-11 06:54 +0000
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-11 01:24 -0600
                Re: Contacts AJL <noemail@none.com> - 2026-09-11 11:09 -0700
                Re: Contacts Frank Slootweg <this@ddress.is.invalid> - 2026-09-11 18:23 +0000
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-11 12:56 -0600
                Re: Contacts Frank Slootweg <this@ddress.is.invalid> - 2026-09-11 19:37 +0000
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-11 12:46 -0600
                Re: Contacts AJL <noemail@none.com> - 2026-09-11 12:48 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-11 21:59 -0230
                Re: Contacts AJL <noemail@none.com> - 2026-09-11 19:12 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-12 01:31 -0100
                Re: Contacts Frank Slootweg <this@ddress.is.invalid> - 2026-09-12 13:00 +0000
                Re: Contacts AJL <noemail@none.com> - 2026-09-12 08:32 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-12 17:31 +0000
                Re: Contacts AJL <noemail@none.com> - 2026-09-12 13:05 -0700
                Re: Contacts Frank Slootweg <this@ddress.is.invalid> - 2026-09-12 18:00 +0000
                Re: Contacts AJL <noemail@none.com> - 2026-09-12 13:05 -0700
                Re: Contacts micky <NONONOmisc07@fmguy.com> - 2026-09-17 13:33 +0300
                Re: Contacts AJL <noemail@none.com> - 2026-09-17 12:30 +0000
                Re: Contacts Siard <saylor259@mailbox.org> - 2026-09-17 15:12 +0200
                Re: Contacts AJL <noemail@none.com> - 2026-09-17 16:12 +0000
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-17 18:48 +0200
                Re: Contacts Arno Welzel <usenet@arnowelzel.de> - 2026-09-18 10:04 +0200
                Re: Contacts Arno Welzel <usenet@arnowelzel.de> - 2026-09-18 10:00 +0200
                Re: Contacts AJL <noemail@none.com> - 2026-09-18 10:58 -0700
                Re: Contacts micky <NONONOmisc07@fmguy.com> - 2026-09-17 13:26 +0300
                Re: Contacts Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-11 00:30 +0100
                Re: Contacts micky <NONONOmisc07@fmguy.com> - 2026-09-12 21:58 +0300
                Re: Contacts AJL <noemail@none.com> - 2026-09-12 13:16 -0700
                Re: Contacts micky <NONONOmisc07@fmguy.com> - 2026-09-13 05:06 +0300
                Re: Contacts micky <NONONOmisc07@fmguy.com> - 2026-09-13 05:15 +0300
                Re: Contacts AJL <noemail@none.com> - 2026-09-12 20:40 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-13 11:22 +0545
                Re: Contacts AJL <noemail@none.com> - 2026-09-13 06:05 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-13 06:54 -1000
                Re: Contacts AJL <noemail@none.com> - 2026-09-13 14:17 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-15 00:50 +0000
                Re: Contacts Frank Slootweg <this@ddress.is.invalid> - 2026-09-13 19:02 +0000
                Re: Contacts AJL <noemail@none.com> - 2026-09-13 14:17 -0700
                Re: Contacts Maria Sophia <mariasophia@comprehension.com> - 2026-09-14 21:56 -0300
                Re: Contacts AJL <noemail@none.com> - 2026-09-20 00:15 -0700
                Re: Contacts micky <NONONOmisc07@fmguy.com> - 2026-09-23 21:02 +0300
                Application identification on Motorola Android (was: Re: Contacts) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-13 08:11 +0100
                Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-02 21:12 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:26 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 22:40 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 02:35 +0530
                Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-03 00:03 +0100
                Re: Signal Nuno Silva <user17785@newsgrouper.org.invalid> - 2026-09-03 01:00 +0000
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 02:47 +0930
                [OT] "trolling" (was: Re: Signal) Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-03 11:49 +0100
                Re: [OT] "trolling" Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 03:38 +0930
                Re: [OT] "trolling" "Carlos E.R." <robin_listas@es.invalid> - 2026-09-04 09:26 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 20:29 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 21:33 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:51 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 22:35 +0200
                Re: Signal "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 23:00 +0200
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-03 02:36 +0530
              Re: Signal Nuno Silva <nunojsilva@invalid.invalid> - 2026-09-02 11:24 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-02 17:30 +0200
                Re: Signal Andy Burns <usenet@andyburns.uk> - 2026-09-03 09:29 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 03:04 +0930
                Re: Signal Andy Burns <usenet@andyburns.uk> - 2026-09-03 18:46 +0100
                Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-04 04:22 +0930
          Re: Signal Maria Sophia <mariasophia@comprehension.com> - 2026-09-01 19:20 +0200
      Re: How does whatsapp work? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-01 17:03 +0200
        Re: How does whatsapp work? "s|b" <me@privacy.invalid> - 2026-09-02 20:56 +0200
          Re: How does whatsapp work? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-02 21:04 +0200
            Re: How does whatsapp work? "s|b" <me@privacy.invalid> - 2026-09-04 21:15 +0200
              Re: How does whatsapp work? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-05 14:14 +0200
                Re: How does whatsapp work? "s|b" <me@privacy.invalid> - 2026-09-05 18:03 +0200
    Re: How does whatsapp work? Frank Slootweg <this@ddress.is.invalid> - 2026-09-01 14:37 +0000
      Re: How does whatsapp work? micky <NONONOmisc07@fmguy.com> - 2026-09-09 09:07 +0300
        Re: How does whatsapp work? "Carlos E.R." <robin_listas@es.invalid> - 2026-09-09 12:53 +0200

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