HI,
I bought one from Starlink in Qatar. FaceTime works with a Qatar sim card in the phone in ANY country. BUT Face time currently won't work if I put a different (non Qatari) sim card in the phone - The APP just vanishes. At least with the model I purchased (Which was sold to me as an "unlocked" iPhone 6+).
You could use FaceTime abroad on wifi with the Qatari sim card in it - BUT this is less than ideal and of little use practically.
I spoke to my network in the UK and they said it was a phone software issue NOT a network issue and I can put my UK sim card in a UK purchased iPhone 6 and I can use my FaceTime account. It just won't work in the iPhone 6 I bought in Qatar.
I went into the Apple store in Regents Street yesterday and a VERY knowledgeable technician reluctantly told me (after a bit of persuasion) the iPhones Apple ship to Qatar have been installed with a different software version to those shipped elsewhere at the request of the "Qatari's". The network (Ooredoo or Vodafone) have tools to enable them to provide certain services on their network and they enable use of Face Time with a Qatari Sim card installed in the phone. But it seems that they don't want people to be able to use face time when you put your own sim in YOUR PHONE. I am not sure why they have done this but apparently this is the case !
I would be VERY wary of buying an iPhone 6 in Qatar for this reason. They will tell you any old crap in the shop and they know very little usually.
It may be possible to restore the phone and put a different version of the IOS on it using iTunes which may fix this issue which I am going to try today but I am not hopeful.
I would buy it somewhere else if I were you. It will be much cheaper too. I will never buy another phone in Qatar.
*if* I have any success with re-installing a different version of the IOS I will post back here or on the other thread and post the link here, otherwise assume it can't be done.
Cheers,
ieye.