A phone you carry into Türkiye yourself will work for a while without registration, but once that window closes the device is cut off from the network. The way to avoid that is to register the handset's IMEI number with the Central Device Registration System. A regulation amendment published in the Official Gazette on 2 July 2026 named the e-Government Gateway as the authority where this application is filed.
There are two sides to the job: the registration application on the Information Technologies and Communications Authority side, and the usage permit fee on the Revenue Administration side. They have to be done in the right order and against the right IMEI, because a fee paid against the wrong number will stall the whole thing.
The steps below cover the full chain, from finding the IMEI and checking your entitlement to paying the fee and confirming that the registration actually took.