[VoiceOps] Appearance of an International call

Pete Mundy pete at fiberphone.co.nz
Wed Jun 15 16:50:40 EDT 2016

Do you think this is an iPhone-specific issue? Ie a fault in iOS and the way it's dealing with decoding the caller ID?

We saw similar issues with txt messages from other mobile users inside our country (New Zealand) way back when the iPhone first hit the market. Basically txt messages would be shown as coming from the full number including country code prefix (+64) and not matched against the number already in the contacts list. Users would then add the new number to the existing contact, then when they tried to txt or call the number back the carrier would refuse the transmission. It all came right once Apple cottoned on to the problem and a fix was included in an iOS update (although it took like 2 months for that to occur, meanwhile pretty much everyone with an iPhone in NZ experienced the hassle of it).

I just wonder if it might be worth testing the same scenario from an Android phone to see if it works. That may help discount the carriers and upstreams as being part of the equation and give you more credence when trying to escalate the issue to Apple (and good luck with that too!).


Ps, yes I also giggled at the Comic Sans on the first posting too ;)

> On 16/06/2016, at 6:54 am, Carlos Alvarez <caalvarez at gmail.com> wrote:
> That sort of conversation was the intent of my original message. We have seen odd things happen from one carrier to another when we don't send the whole presentation. The carriers will accept a 10 digit caller ID but then something strange will happen at random. So that's just one of many things that could be going on.
> Sent from my iPhone
>> On Jun 15, 2016, at 10:57 AM, Alex Balashov <abalashov at evaristesys.com> wrote:
>> Comic sans isn't a fashion accessory in my part of town. 
>> I figure this is an issue of presentation and locality setting transmission. Don't GSM/3GPP and LTE require all numbers to be internally represented as fully-qualified E.164 anyhow? What gives a number "local" presentation is a setting on the phone that says "I'm within this country code", and I imagine that whether this is honoured can be modulated via some calling number presentation setting in the signalling message. 

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