Xperia L (C2104) unusual behavior when GPS is active
Upgrade to Android 4.2. That fixed the problem to me and the original poster. I was getting an average of approximately 100 disconnections per day, in about three weeks. Since upgrade a few days ago, there were only 7 disconnections, even with Google's location service enabled. I think the firmware update 15.0.A.1.31 (based on Android 4.1.2) introduced the problem, but anyway we confirm that it is fixed in 15.3.A.0.26 (the upgrade to Android 4.2.2).