First confirm your Phone Fault, its simple as follow:-
(1) Put working Sim in ur phone.
(2) Turn On Phone
(3) Goto Menu / Network Selection
(4) Choose Mannual mod
if ur PHONE finds All Available Networks in ur area, than ur SURE that Rx Path is OK.
Than if ur request for LogIn Failed it means that Tx is Faulty.
WBR
Ashwani Gaur |