I am trying to bring up LTE on NXP board with Quectel EC25-E on Android platform. We got Mobile network settings and Mobile data is enabled.
and 4G enabled from Settings->WIRELESS & NETWORKS -> More…->Mobile Networks-> set the preferred network…
Sets APN for the sim etc
even that I didn’t get network yet . and it is not showing network symbol.How to resolve this?
First of all, we must first determine the status of the module, and send commands through the serial port or USB interface to obtain the status information of the module.
- AT+CPIN? Query whether the module successfully recognizes the SIM card.
- AT+CSQ query the signal quality of the module.
- AT+CEREG? Check whether the module is registered on the network. If it returns “0,1”, the module has successfully registered on the network. Otherwise, you need to check whether there is a problem with the module, whether the SIM is in arrears, etc.
If there is no problem with the above confirmation, you need to check the operation of the MCU part.