MuscleNerd of iPhone Dev-Team has released the updated version of Redsn0w 0.9.5b2 jailbreak tool providing the solution to fix MMS, SMS and data issues on iPhone OS 4.0 jailbroken firmware.
Change log of Redsn0w 0.9.5b2 Tool
MuscleNerd For those 4.0b1 JB devs with SMS or data issues using redsn0w, the update at http://is.gd/buMgi should fix (restore 1st!)
For those JB app devs who experienced SMS or 3G data failures, the new 0.9.5b2 download at the bottom of this page should clear things up. You’ll need to do a fresh restore to stock 4.0b1 before applying the new beta redsn0w update.
Earlier we posted step-by-step guide to jailbreak iPhone 3G on iPhone OS 4 Beta1 using Redsn0w 0.9.5.
Download redsn0w 0.9.5b2 for Mac to jailbreak iPhone 3G
Redsn0w 0.9.5b2 for Mac