Hey I had problems with battery life, 4 hours from charged to dead as long as you didnt use it, less if you did. I called rogers, even though my phone is 6 months old and under warranty they told me they would do nothing and told me to contact samsung. Samsung was helpfull, the agent I spoke to told me that there were "massive problems" with the rogers version of jelly bean for the sgh i727r. He advised me that because of the problems, even if phone is out of warranty, rooted, or has had custom roms installed( flash counter triggered) they will repair phone for free. they sent me a prepaid ups shipping label to return phone, and the turn around time is half what rogers advised me as well.