We are developing a roaming device, which will send emergency relevant information using data. So for us it is critical to get a fast connection to the best network available. If we just use the automatic operator selection (AT+COPS=0), it will not always be the best operator in terms of signal quality, as the operator of our SIM cards has a preferred operator list set.
So now we are checking how to find out which operator has the best signal quality first and then connect to that specific operator manually. Is there a way to get the signal quality of all operators without connecting to them first?
We only find the solution to connect to each of the operators and then check the signal quality afterwards, but this method will be too slow.
Thank you very much.