I'm running an iphone 4 on 4.2.1 w/ greenpoison rc6. Every time I download a tethering package, my phone completely loses it's ability to connect to at&t cell service. It spends 20 minutes searching and then ultimately says 'no service'. Mywi used to work on my phone, but after a day of usage (the ethernet in my dorm shut off), my cell signal just stopped. I uninstalled and reinstalled mywi and during the time after the uninstall, my signal came back to 3 bars on 3g. After I installed again, it was back to no service. Same deal with tetherme. Has something gone wrong on my phone?