What is Passport Registration for a Phone?
Passport registration is done for phones brought into the country by travelers from abroad. You can see many listings with the heading "Passport Registered Phone" on forums or classified sites. These phones are brought in by a person coming from abroad, and within 1 month of entering the country, the phone's invoice and IMEI number must be registered to their passport.
How is Passport Registration Done?
Passport registration can be done once every 2 years for phones. For this reason, if a person can bring a phone from abroad but cannot register it to their passport, they sell it by saying "registration belongs to the buyer." If you buy such a phone, you need to find someone who has entered the country within the last 1 year and has not registered another phone to their passport within 2 years, and register the phone to their passport. You can find people who do this for a fee on forums.