I have an 8290 with rom 5, has no signal and network after upgraded. but sometimes it picks up signal and network in a minute ~ 1/2 hour, after that very stable connection, i can make and receive a call, then if i turn the phone off/on again, the problem comes again.
Here what i did: ( I did some phones with same thing a couple times before very smooth and with no problem)
The firmware version was V5.06, i flashed to v5.22 (MCU, MPP, Eeprom), and i used Nokia Tool 3.03 to changed original IMEI, then used Eeprom tool to update authorityID, unlocked, Repair IMEI and Factory Reset.
I don't have any hardware of box, only flash and m/bus cable.
Anyone can help solve this problem?
Thanks!
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