Iphone 3gS tethered jailbreak using Blackra1n. Installed Mywi (no rock) through Cydia. Works great, however it kills the phone battery even when you stop the application. I turn off wifi tethering in Mywi when I am done. I turn off wifi in the phone settings. Check my Ipad wifi and Mywi is no longer showing up as an access point. A couple hours later, the phone is stone dead requiring a new jailbreak to restart it. What am I doing wrong?