How to calibrate RF signal level after firmware upgraded

Legacy Legacy AirPrime modules
1

The RF signal became weak after Q2868H emulator upgraded to the newest firmware R71a. Sometime it cann’t register to network due to weak signal level. (use DWLWIN to upgrade firmware)

Here are the results:

at+cgmr
R71a01gg.Q2686H 2076692 052808 20:08

at+csq
+CSQ: 12,0

at+cind?
+CIND: 4,1,1,0,0,0,0

The result for previous firmwave R671 +CSQ: 17,0 and +CIND: 4,3,1,0,0,0,0

Anyone knows how to RF calibration?

Thanks in advance

2

What makes you that it was the firmware upgrade that caused this?

It seems highly unlikely to me! :open_mouth:

3

I have selected to erase the following items when I upgrade the firmware:

  • Objects
  • Customization Files
  • OpenAT application

So I am wondering that the old calibration data e.g. RF, battery… have lost after upgration.

-Thanks