E770 Call Problem

[..:: i-MAX ::..]

i have a new e770
i can received calls SMS but i can't call any number same with SOS all time show :
- refused
- call ended

i have reset it with *2767*2878# and *#9998*3323# but same

maybe hardware problem any idea

thanks

[KhUSbCOMGSM]

i have the same probleme but after flash with ufs hwk it's ok
good luck

[KhUSbCOMGSM]

need help for e770 schematic
thx in advance