Immediately after the upgrade I had the Swype issue and the tremendously REDUCED battery life: discharging, with MINIMAL use, after only half a day!
After much research, I went to the Sprint store where they did a factory reset/reinstall.
After that, my battery life increased to 8 to 9 hours with minimal usage - a far cry from the pre-upgrade behavior of nearly 2 days with quite a bit of usage. My Swype issue was addressed successfully.
About a week later, all of a sudden I started having an email issue: I can receive, but NOT send. It hangs for quite awhile, then finally says 'connection error' and gives a notification of 'Sending Failed'. The email sits in my outbox forever. I say 'all of a sudden', because I just happened to send one email that sent successfully, and several minutes later - sent another - but that never happened - and have been unable to send any since then. I have cleared cache & data - rebooted - disabled the Email app - rebooted - deleted and re-setup my email accounts multiple times, etc, etc.
Also had another issue arise on the same day as the email issue: sent a text message that never transmitted - then 6 days later the recipient texted me, saying they just received that message!
I am at a loss as to what to do. Needless to say, I am not happy. Just got this phone, my first smartphone, on May 22nd. Loved it! Now... many dollars later and much wasted time - I hate it. Having already been thru the factory reset and other actions described, I feel helpless. Any ideas????