3GS 4.2.1 w/ 6.15 - No Service?

[AppleFan21]

I recently bought a used 3GS that had the 4.1 firmware and 6.15 BB on it. Without thinking, I upgraded to 4.2.1 without saving the SHSH. Now I'm on 4.2.1 with the 6.15 BB and I have the tethered jailbreak and ultrasn0w 1.2 installed. However, I get "No Service" when I enter my T-Mobile SIM card. I've tried everything from Airplane mode to Resetting Network Settings. Can anybody please help me?

[Turnamental]

I recently bought a used 3GS that had the 4.1 firmware and 6.15 BB on it. Without thinking, I upgraded to 4.2.1 without saving the SHSH. Now I'm on 4.2.1 with the 6.15 BB and I have the tethered jailbreak and ultrasn0w 1.2 installed. However, I get "No Service" when I enter my T-Mobile SIM card. I've tried everything from Airplane mode to Resetting Network Settings. Can anybody please help me?

If it was unlocked on 4.1 with BB 6.15.00 then you should most def have the shsh saved on Cydia.

Downgrade to custom 4.1 ipsw and JB/Install Usn0w...

I say just keep 4.2.1 and follow this video to the letter

http://www.youtube.com/watch?v=0I1dNq5g3Kk&feature=youtube_gdata_player

[DevouredDreams]

did you turn 3g off?

[i88ram]

your kinda lucky man,
you are able to get to
the springboard..i cant
even get there..im stuck
in emergency call for
bout 3days now..ive
done all the guides but
it isnt working for me..

3gs 4.2.1
baseband 6.15.00
stuck un emergency call

[AppleFan21]

It was NOT unlocked on 4.1

[i88ram]

so what should i do now?
help me outta here
emergency call screen..

[Aydn]

common problem. you should utilize the search button.

replace the lockdown folder as per

easy way to solve diff sim detected (emergency mode ) after jailbreak - GSM-Forum

[i88ram]

Thankz a lot!!! It worked!!!

[Aydn]

Click the thanks button

[i88ram]

how about this kind of 3gs problem?

Unclickable WiFi button,
Unclickable Bluetooth button,
no IMEI
no ICCID
and no MODEM FIRMWARE..

and then in 5-10mins it just
restarted itself..


later its in 4.2.1,ive
downgraded it to 4.1

but still the same..



http://mail.aol.com/33124-111/aol-1/...wMail&partId=2

http://mail.aol.com/33124-111/aol-1/...wMail&partId=2

[AppleFan21]

I'd appreciate it if you'd stop hijacking my thread.....can anybody else help me?