AT+COPS=?
Test command returns a list of quadruplets, each representing an
operator present in the network. The quadruplets list is ended with the
range values of the <mode> and <formats> parameters.
The quadruplets in the list are closed between round brackets, separated
by commas, the <oper> parameter is returned in both formats.
+COPS: [quadruplets list (<stat>,<oper (in <format>=0)>,,<oper (in
<format>=2)>,< act>),
(<stat>,<oper (in <format>=0)>,,<oper (in <format>=2)>,< act>), ...]
[,,(range of <mode>),(range of <format>)]
<stat> parameter is described in the Additional info section.
Additional info:
Since with this command a network scan is done, this command
may require some seconds before the output is given.