How to Jailbreak and Unlock an Iphone 3G (4.2.1) with UltraSn0w and Redsn0w

How to Jailbreak and Unlock an Iphone 3G (4.2.1) with UltraSn0w and Redsn0w

Hello youtube its pspslimhacks aka Hector Bautista
Today im going to show you on how to Jailbreak and Unlock your iPhone 3G. This will only work on the Iphone 3G. Jailbreaking allows you to tweak your Iphone using cydia and 3rd party applications. Unlocking allows you to have any service/carrier (instead on having service with ATT you can put a T-Mobile Sim, Verizon, Simple, etc car and it will work)


Iphone and Ipad firmwares:

1. Make sure you have Iphone 3g 4.2.1, Ipad 3.2.2 original firmware, and Redsn0w saved in your desktop (or in the same folder)
2. Right click redsnow and click properties
3. Go to the compatibility tab and make sure you have the first box checked with Windows Xp service pack 2. Also make sure you have the box at the bottom checked and click ok
4. Run Redsn0w and click browse
3. Browse for your iphones original 4.2.1 firware and click next
5. After the data finishes make sure Install Cydia, Battery Percentage, and Ipad Baseband are checked
6. Click next and Turn you iphone completely off7
7. Follow the instruction on redsn0w (putting your device in DFU mode)
8. Wait till redsn0w finishes jailbreaking and Unlocking your device
9. Open cydia and go to manage
10. Go to sources and add the following source ”
11. GO to search and search “Ultrasn0w” by
12. Install ultasn0w and reboot your device
13. Insert your sim card and it should have the service running on the Iphone

If it doesnt find service, turn on Airplane mode then turn it off.

Please Comment, Thumbs UP, and Subscribe for more Turorials
-Pspslimhacks aka Hector Bautista


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  1. Halibello, i saw a lot of you'd difficulties with scam unlockers, and so i have to sare this with you, I know there are numerous unlock providers are scam on the net as me and my college have only a little cellular phone shop, one of the FASTEST and greatest site with great customer feedbacks between lots of unsucessfull tries with other unlocking sites was attphoneunlocking.(com) they provide factoy unlocks any iphone locked to the att network yeah, thats right and also the newest iphone 6 and 6+plus in less than 24h.

  2. i have a problem, I have downloaded the firmware but I cant load it as nothing is showing as ipsw file. I'm using windows pc. thanks 

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