Has the iphone 4s "no service" issue been resolved yet-- seems to happen on all networks so not a carrier problem..maybe the aerial??

Tried the Iphone 5 .. didn't like it. But my 4s keeps giving me a No Service message and won't reconnect without a full reboot, which is extremely tedious. Other forums seem to indicatre this is not a catrrier problem but maybe the dual aerial switch?? is there a known fix? (ios 6.01 didn't make any difference). If not I guess my next step will have to be a Galaxy 111.