Problem : Signal in unstable, Sometimes strong, Sometimes weak.
Repair Procedure :
Investigating that handphone can be used to look for network by manual. If handphone can not look for network according to manual, So IC RF (HAGAR) was brokens, Change IC RF (HAGAR).
Investigating also what stripe to IC PA is not brokened off.
But if handphone can look for network by manual, So IC PA which broken, Change PA's IC.
If hardware from handphone has been tested and Repaired but problem has appeared, We must programming again the software as according to kind and Handphone version or With latest version.