Phone baseband version unknown

4.5

In Settings > About Phone, the baseband version is listed as "Unknown".

Symptoms
  • No signal
  • WiFi/BT fail
  • Radio off
Possible Causes
  • Modem firmware crash
  • Corrupt partition
  • Hardware failure

Step-by-Step Fix

1

Restart Phone

Often fixes temporary modem initialization errors.

2

Update OS

Ensures you have the latest modem drivers.

3

Flash Modem.bin

Advanced users can flash just the modem firmware via PC.

When to See a Technician

Unknown baseband means the OS cannot communicate with the cellular radio hardware.

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