I only have 15 apps and before the update I had less but the update, as you know, came with new apps. Apps aren't my issue. And are you saying you've downloaded 4.3 and aren't having battery issues?
If it's stalling, turn the WiFi off then back on and it will continue. Also I've noticed it stops if you let your phone fall asleep so don't let your phone fall asleep. Hope this helps!
Posted via Android Central App