sir i got no service error message after upgrade my iphone 3gs ios5.0.1 from 4.1 my base band 06.15.00 shsh:4.0.1, 4.1,4.2 ,i did the following steps for upgrade from google search downloaded : sn0wbreeze v2.8b11 , iPhone2,1_5.0.1_9A405_Restore Step 1. Opened Sn0wbreeze and browse for the 5.0.1 firmware Step 2. Select new boot rom Step 3. Choose expert mode. Step 4. Click on general then next. with in the general option click check the box activate the iPhone. Step 5. Click next then choosed build ipsw then click next again. Step 6. ipsw is done, sn0wbreze guided in putting device into a pwnd DFU mode. Step 7. Opened Itunes and shift click or option click on restore. Browse for the sn0wbreeze ipsw that was created on desktop. Step 8. After it is done restoring my device stuck on the apple logo screen. Open up iBooty Step 9. In iBooty just selected device and put my device into DFU mode device then boot up. then i configured and opened cydia installed ultrasnow after that reboot my device but my device shown now no service. please help me for solve this.