My phone is excellent and fast; it has never hung and runs very smoothly to this day. The battery is 100% healthy; charge it to 100% and enjoy all-day battery life even while browsing the internet or watching videos, with 20-30% charge still remaining. I hope you won't regret buying this phone and will be able to use it well. Use the phone for two days; if you feel it's good, keep it, otherwise return it.