Here are the frequently used SMS commands to check / update device remotely
Command Description
fns fns getstatus To check the the modem status
fns fns getgps To check the GPS signal strength
fns fns cpureset Reboot device
fns fns getver To check the device firmware version / IMEI Number of the device
fns fns deleterecords Delete records saved on flash memory of device
fns fns setparam 1242 NewAPN To update APN of the device's sim
fns fns setparam 1245 abc.findnsecure.com To update domain/IP of device
fns fns setparam 1246 21000 To update device port address