I have an iPhone 2G, jailbroken using blackra1n. I don't have a data plan, but I am using AT&T... My problem is this, sometimes when my iPhone is in standby mode, it won't wake the screen, play my text alert, or vibrate when I receive a text message. Then when I wake it up manually later, it will either instantly alert me, or it might take a few minutes of my using it before it decides to alert me. There seems to be no rhyme or reason to any of this, and I've tried restoring and rejailbreaking multiple times, to no avail. Any help would be awesome!