Best way to jailbreak/unlock att iPhone4 Ver 4.3.5. Modem firmware 04.10.01

Discussion in 'Jailbreaks and iOS Hacks' started by fastforded, Feb 25, 2012.

  1. fastforded, Feb 25, 2012
    Last edited: Feb 25, 2012

    fastforded macrumors newbie

    May 19, 2009
    Hoped I could get some good advice.

    I have an Att iPhone 4

    Version 4.3.5
    Carrier Att 10.0
    Model mc319ll

    Modem firmware. 04.10.01. Is this the baseband?

    I need to unlock this phone, but I don't know thud best way?

    I want to use my sim card from my Att prepaid phone

    I have read a lot, and the more I read the more I'm confused...

    I was going to update to IOS 5 and then back up and then jailbreak...

    But I heard that Att locks the phones so I can't use any other sim, but if I jailbreak I still need to unlock? Amd if I unlock can I use another Att sim?

    Didn't know if there was any good info or instructions....

  2. miles01110 macrumors Core


    Jul 24, 2006
    The Ivory Tower (I'm not coming down)
    Baseband 04.10.01 is not unlockable. You need to buy an unlocked phone if you want to use it on other carriers, or get the Gevey Ultra for the unlock "hack."
  3. fastforded thread starter macrumors newbie

    May 19, 2009
    So the modem firmware is the baseband?

    And when I use the gevey ultra, I use my sim card from another carrier or the gevey ultra is the sim card?

    And from what I understand I need to jailbreak the iPhone to use the gevey ultra?

  4. TriJetHero macrumors 601


    Oct 13, 2010
    A phone with 04.10.01 BB can be unlocked wit a Gevey SIM imposer.

    If you upgrade to 5.01 you need to preserve your current BB, 5.01 comes with 04.11.08 which is unlockable at present, but there are some vids showing an unlock with new SIM interposers aswell.

    Upgrading with no BB can be done with redsn0w, you'll find some good instructions on this forum or iCalrified
  5. forcetactic macrumors 6502

    Jul 30, 2010
    If you pay more than $45 a month on att prepaid, switch to straighttalk. $45 unlimited data/text/talk and works on any ATT locked iPhone
  6. fastforded thread starter macrumors newbie

    May 19, 2009
    Just switch sim cards and I dont have to unlock phone or use sim card imposer? Thx


    how do I do this? Guess it's just not backing up?

    And what can I use to jailbreak iPhone, and can the jailbreak be undone?

    I've been reading for hours and seems like there's lots of info but I don't know what applies... My first time unlocking and jail breaking...

    Thanks for the info
  7. ninjaw95 macrumors 6502

    Nov 30, 2011
    preserve BB to 5.0.1 get a Gevey Ultra like i did :D

Share This Page