i use fastract supreme 20 , 663g. I face alot of problems about signal quality. at+csq responses become under 10 in some places. Bc of the weak signal, modems connect to server very hard. sometimes they get stucks. I have added many controls in the software to reduce this problem. For example i check at+creg response periodicly. But these controls does not solve the problem permanently.
What i want to know is if there is a way to increase signal quality. I guess it is not related with the software. I think it is about the antenna. I use standart antenna wich wavecom sends us. it hasnt got a cable. it is short(5 cm) and pluged in directly. Do you know any other antenna which performs better? Or which way can i follow to get rid of the problem?