a). Check if the device detects the SIM card.
b). Check the antenna is installed well or not.
c). Check if the SIM CARD is according with the Specifications of the TPS530.
If your SIM card not belongs to these bands, please change the SIM card with correct SIM card.
d). Check whether the device can detect the wireless module or not.
d). Check the wireless Signal strength and Service state.
Settings->“About Phone” ->”Status”-> “Signal strength” and “Service state” .
If the Service state is “In service”, it is normal.