I'll be upgrading to v 5.1 soon, I'm just waiting for my battery to charge that way I don't run in to any problems. Sadly, it seems to take about 4 hours to charge for 100% battery? I don't understand that Also my phones been charged in the wall and I'm not using it, yet the battery stays at 51% and when I finally decide to reply to a text message it goes to 50%? Is it normal for it to take this long to charge? Also how long are you guys getting on a 100% charge. I unplugged my phone at 7am and it died by 2pm. NO GPS, NO WIFI, NO nothing really. Internet was on and listened to music for about 30min to 1 hour of music. Frequent texting and very little internet use.