There is a mention of three carriers who provide some kind of
local support in Pakistan by name, in an Apple page online...
4. Contact carrier for availability.
The image above is from this Apple Support page, w/ little else.
•Wireless carrier support and features for iPhone - Apple Support
There may be a way to learn more about availability of Apple
through Authorized local companies by use of this link, & city
name, to use their locator information:
https://locate.apple.com/asia/en/
Use the Country box in Sales (or service, etc) to choose Pakistan
enter City name and choose Product (Mac, iPhone, etc) for info.
Since I didn't know local name of relevance, that's as far as I got.
Any of the larger cities may have an independent authorized agency:
http://en.wikipedia.org/wiki/List_of_most_populous_metropolitan_areas_in_Pakista n
Hopefully this helps you find some regional information on iPhone
and the service support or sales Authorized company there. And
the persons who work in one of those may have the info you seek.
Good luck & happy computing! 🙂
edited