I've had a Razr Maxx for about 2.5 years, and it's been working pretty ok, all this time. The update to 4.12 that was pushed in Nov.2013 did cause some issues for a few months, apps just didn't run as smoothy. Certain things, like rhapsody, would randomly fail when you clicked play to play a track. The biggest problem was lagging. Esp with scrolling. Task managers or the lack of, and just closing apps manually, deleting cache, even clearing ALL pictures off the phone and a cold boot, did not resolve. I then did a factory reset, which was ok for a little while and then it started to drag, again.
Verizon replaced the phone with another Razr Maxx, and after doing my re-install everything seemed ok. The phone wasn't getting "hot" like the previous one was, so they were convinced there was a processor problem. As the phone would lag worst when it got up to operating temperature, or, a stream of TXT-ing or facebook messaging had just happened. Or the battery was low.
In my experience I have found clearing out long back-and-forth text message threads help a LOT, as well as (strangely) toggling your wallpaper to a different choice. It only improves/improved performance for a little while though.
Now with this NEW phone, and no reason why it should lag, I did however notice that as all my programs were updating, the problem seemed to return after I installed Twitter (and more specifically when it got to the SMS part), or Facebook. Though facebook was working ok on the phone and it didn't seem to start the lag problem til I installed Twitter. I force quit the app so the two werent forced to 'play nicely' together. Then I put google search on the phone, so i'd have the toolbar on my homescreen and could search by clicking the microphone. Mistake. Now it's so laggy. So I don't know where the problem lies.
Any advice? My internal 16gb is relatively empty as there's no pictures and about 25 apps. I think I have narrowed the culprit down to one of these 3 apps though. @oceddie oceddie might have some helpful advice.