The users who jailbroke their iPhone using RedSn0w tool reported problems about APN and MMS service on their iOS 4. The dev team behind Redsn0w listened to those complains and have finally come up with an update – Redsn0w 0.9.5b5-5, which fixes all these issues.

The updated Redsn0w would take care of all the issues which you were having with the previous release.

According to their website:

The latest redsn0w beta should fix any APN or MMS issues that users were seeing. It’s safe to re-run it on an already jailbroken iPhone without restoring…just deselect “Install Cydia” if you do that.

You can download the latest Redsn0w 0.9.5b5-5 for Windows from here, and for Mac from here.

You can also follow our complete guide about How to Jailbreak your iPhone 4 on iOS 4 using Redsn0w to successfully jailbreak your iPhone 3G or iPhone 3GS.