I installed OS 4.5.0.37 to my T-Mobile 8820 a week ago Thursday. 2 days later I got the "Sim Card Rejected" and "SOS" signal strength messages. I did the battery and card pulls etc. but lost phone, text and email functions, although the internet worked. I took it to TM on Monday and they (without noticing the OS I was running) replaced the sim card. Everything was fine until this evening where it appears to have fried the card again...again, just the internet works. Has this happened to anyone else who has done the upgrade? Time to restore the old OS ugh!
