Band change in motorola c139

[Yache]

hi all
i have these phones
imei starting with 01
ntwk band 850/1900
i need to make make them wrk in band 900/1800
any asistance will be appreciated
thanks in advance while i wait your help asap
rgd!

[c_ahmad79]

there is one soloution..................... try to connect your phone in smart moto trhough smart clip there is one option band update..... you just select 900 and 1800 there and update band....tested on many phones......... and working too.............

[Yache]

there is one soloution..................... try to connect your phone in smart moto trhough smart clip there is one option band update..... you just select 900 and 1800 there and update band....tested on many phones......... and working too.............

thanks m8

but this seems different
it is not a p2k phone bur acer
and not supported in smart-moto
i think it has to do with hardware,maybe change of some filters as they are in many nokia phones
but i have no idea in motorola phones
pls any more option?
post here to help me out
thanks!

[cellz]

yes you are correct
you need to change filters and i assume flash with the 9/18 flash file...