2720a-2b RM-520 v8.62 successfully convert to RM-520 v8.20 and unlocked by cyclone !
P/S/: nguồn2720a-2b RM-520 v8.62 successfully convert to RM-520 v8.20 and unlocked by cyclone with procedure...
1. Box: Cyclone Box with DCT4 plus activated
2: Cable: UFC Cable set to 5.1k
3. Flash phone using RM-519 v8.20 firmware to downgrade
= download the firmware at cyclone support site =
4. Write PM file
= download PM file = here
5. Unlock and repair BT if necessary
6. Do hardware modification
2720a-2b RM-520 v8.62 successfully convert to RM-520 v8.20 and unlocked by cyclone - GSM-Forum