Very low Radio Signal on G4

[WhiteWizard]

Hi, my G4 was originally from spain Vodafone, it was SIM unlocked, I believe with lokywiz, it accept any SIM but the GRPS signal is very low, some times it give me the "No Service" message, sometimes it keeps searching for an anthena.
I upgraded the spanish ROM to Touch Xb by Gullum, without problem, and radio to 2.19.21, but no avail
One thing is that the product number is 99HBE086-00 A
Compared with my original Qtek S200 G3 wicht is 99HBE043-00 T01
Both machinnes had the same OS ROM and same Radio ROM, however G3 signal is very good, 1 bar less than a regular Motorola, while the G4 is looking for signal almost all the time.
I used to have a T-Mobile Wallaby, with a very similar problem.
Somebody can help me?

[biokiller]

u can find a new radio rom in wiki.it's ver 2.69

[WhiteWizard]

It was a hardware problem, one circuit track that connect the anntena was loose, also the internal battery was dead (and a little bit rusty), and the speaker was cover with some cotton or something, otherwise it didn't work, similar cutted cikuit track in the speaker.
I fixed all those problems, my G4 now performs just like my G3.