I have jailbreak my iphone 4 and now currently, internet is working but I cant do the facetime and MMS? ANy one with a solution will be appreciated. Thanks This worked for me....I hope it does for others. OS4 missing cellular data network tab FIX* Your Ad Here 1. Open cydia and install winterboard 2. add source: http://cydia.xsellize dot com 3. Search Supreme Preferences 3.0 and install 4. Open winterboard 5. check it off the supreme preference tab and respring 6. Then go to settings 7. click supreme preferences tab and go to applications, than go to phone. 8. Cellular data tab: On 9. Click home, than settings 10. General, network, and it should be their.