Lost activation on JB phone, how to recover
I upgradede my 3GS, jailbroken with Blackra1n on 3.1.2 to 4.01, no problems. Then I jailbroke with Jailbreakme and unlocked with Ultrasnow...no issues.
Next I tried this with my son's identical 3GS, with unknown JB and unlock, and got stuck in emergency call mode while upgrading, had to go to DFU, try multiple user accounts, and finally windows, and now I'm stuck in connect to iTunes followed by unrecognized SIM card (need to activate).
1) Why did my upgrade to 4.01 NOT affect my activation (I only needed to "Upgrade to 4.01), but my son's 3GS lost activation in the process (eventually a full restore to get out of emergency call mode).
2) The Phonebook Simcard trick no longer works to activate the phone, and the phone is not jailbroken so iRecovery apparently isn't an option, so what options I activate the phone again so that I can jailbreak and unlock it?