It's not the baseband, it's the way that the stock sony roms handle low signal areas. You need to set it on GSM only mode, if it is on WCDMA (3G) preferred, it tends to disconnect in low signal areas. Both my Xperia M and M2 have exhibited this behavior on stock rom, CM11 on the Xperia M didn't.
Android is a Linux-based operating system, but this fact doesn’t put … more
21 Sep 2014
By Tomek Kondrat
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?