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However, MT6580 devices share a notorious vulnerability: .
A: You likely lost your NVRAM calibration data (RF parameters). Run the CDS information reset in Engineer Mode, or reflash the original modem firmware. mt6580 imei repair code
A: Yes, the *#*#3646633#*#* code works on most MediaTek chips, but the AT command syntax is identical. However, MT6580 devices share a notorious vulnerability: