replace modem.img to test other basebands for MT6589

[g3kamdbs]

You can try flashing from SD Update. You'll need a custom recovery. I don't think it will make a difference though.

So you're able to connect to 3g when the signal is full. That would indicate to me you're not in an area where the 3g signal is being broadcasted strongly, or possibly some issue with your 3g radio's antenna.

What happens if you switch to WCDMA only. Can you make phone calls?

I was able to make phone calls with WCDMA too. However I would get cut off randomly and the data connection was very flaky.

I would understand weak signals and poor antenna. However the signal strength was mostly showing 3 bars not 1 or 2 bars out of 4. Basically I did not get consistent data + voice connection if the bar was not full. Another note was that I only got internet connection when the signal indicator was only on H+ and not H, which is really weird.

This problem absolutely went away with GSM only connection. I was able to get data connection (very slow but consistent) and make phone calls consistently.

So back to the original question. I take that there are no further actions need to be taken to just replace the modem.img file and it should work? Does it matter if my phone only has a single SIM slot? Most of the other clone models have dual SIMs.

Thanks