GSM SIM800 Connection Lost issue after 10-15 days

Here I am using sim800 with PIC18F97J60 microcontroller. After hard restart the device it’s working fine up to 10-15 days and after suddenly network disconnected. What can I do for this issue. Please help me on this isseu asap.

Add timeouts and reconnects or restarts in code to counter it. There is no other way. GSM always disconnect after a while.

Thanks Ravi , I have already given timeout after every command sent. I have resolved this issue using AT+CPOWD command after disconnected.

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