This may seem like a silly answer but first, check with your carrier to make sure your service has not been disabled. You may also try to reinsert your SIM card to see if this has any effect.
As far as any actual damage to your device, we have no way of troubleshooting that without knowing which device you're talking about.
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On Android, you can dial ****#*#4636#*#**** to determine your service status.
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On Android, you can dial *#*#4636#*#* to determine your service status.
This may seem like a silly answer but first, check with your carrier to make sure your service has not been disabled. You may also try to reinsert your SIM card to see if this has any effect.
As far as any actual damage to your device, we have no way of troubleshooting that without knowing which device you're talking about.
On Android, you can dial ****#*#4636#*#**** to determine your service status.