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- 21:05, 7 August 2025 IamMyron07 talk contribs created page Diagnosing iPhone “No IMEI / No Service” via RFFE Bus Analysis with ESP32 (Created page with "{{Repair Guide|Affects parts=Main Logic Board|Needs equipment=ESP32 Development board, flux, jumper wires, microscope, soldering iron|Difficulty=3. Hard|Type=Soldering}} == Problem description == You’re working on a phone (e.g. iPhone 12/13/14/15) that powers on normally, but when you go to the dialer and type *#06#, no IMEI is shown. Baseband-related functions are not working (no signal, no cellular data). Traditional board-level repairs (Baseband CPU reballing, BBP...") Tag: Visual edit