Hi guys, I'm looking for some assistance in upgrading to IOS 6. I have an IPhone 4 with IOS 4.1(8B117) baseband 02.10.04 that I used with Simple Mobile. However, I port it out my simple mobile number to H20 wireless. The porting was done free of hassle. Now when i put in my H20 sim card, i get a one bar or No Service. Do I have to preserved my baseband and update the IOS? Will someone direct me on the right direction? Thanks in advance for any help.