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If the phone's operating system rejects every master code, the firmware structure requires a software-based injection via a PC connection. Fix IMEI on SPD , RDA & Coolsand Mobiles – All FREE!

The quickest way to fix an , Null IMEI , or Emergency Calls Only status on China-built feature phones powered by Coolsand or RDA Microelectronics chipsets is through hidden keypad master codes. coolsand rda imei repair code best