When the network is lost, will the IP address assigned to the module be still valid?
In case the network is lost, even though module is not attached to the network, but the existing PDP context will still be active and the IP address assigned to the module will be valid. When the GPRS network is lost, an internal timer T3212 is started in the module. If the network coverage is recovered before this timer expires, then the module can use the existing PDP context. The value of this timer is decided by the network provider. The existing IP address will remain valid till the timer expires .