[Carrier Request] Azercell (MCC 400, MNC 01)

[Rafaello21]

Carrier details:

• Country: Azerbaijan 🇦🇿
• Carrier: Azercell
• MCC: 400
• MNC: 01
• VoLTE Support: Confirmed on other phones (Samsung/iPhone)

Tested on OPPO Find N5.

IMS registration fails even when carrier configs are overridden and ims APN is manually added.
Requesting addition to compatibility chart and proper config support.