Micromax Q452, Service Manual

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24. Network issue:
Solution:
 Flash the handset with latest SW

Check the RF Antenna Slot soldering quality, if not, Re-sold it or change it.

Check the RF coaxial line normally or not. Re- Assembly it or change it.

Check the RF connector normally or not. Re-sold it or change it

Strongly solder 26M Crystal or change it

Check the RF PA normally or not, then Re-Solder RF PA or change it.

Check the RF IC normally or not, then Re-Solder RF IC or change it.

Check the CPU work normally or not. Re-Solder the CPU or change it
RF antenna
Connector
RF ANT
connector
RF
PA(2G)
26M
CPU RF IC