[Q] Radio - Signal Problems after Custom Rom
I'm looking for some help with my son's sgh-i757m phone. I'll try layout my history on the phone and question in some hopefully easy layout.
What I did
at my son's request, I changed the stock rom on my son's sgh-i757m (Samsung Galaxy S2 LTE) for him. He wanted to be able to install apps and customize his phone as he wished. i installed the paranoid android rom for him successfully.
Once installed he began losing cell phone network connection. This progressively got worse and now it barely works.
I tried installing other custom rom's to see if this would resolve the problem. Nothing seems to work. The present rom I have which is Dadoes. This one seems to work the best BUT i only get signal within 1 block of the cell phone tower. (oh ya... i live in a small town where we only have two cell towers in the valley here.)
I tried researching terminal commands to boost the radio signal but I haven't found anything for the sgh-i757m.
I've also done the *#*#4636#*#* trick... nothing... i've installed network boosters but those don't do anything.
What Haven't I done
I haven't tried to install a different radio rom... (maybe I did, but in my research there isn't an explanation if this is different from the OS rom).
I haven't tested whether it is a hardware issue as I don't know how
What I am asking
Can I get help regarding radio roms; is this different from OS rom's? if it is different... where do I find them and more information on this?
Can I get help on steps to test my hardware to see if this is the issue?
Any pointers if I am missing anything?
Thank you... oh and this is my first post.
I'm out of lurking and posting now.