Is there any way to make the iPhone roam for WiFi more aggressively than it does by default? I have an old iPhone 3G, jailbroken of course, and I find it stubbornly holds on to a WiFi connection even when a stronger connection becomes available. I would like it to latch on to the stronger access point.
Your 3g wifi is terrible because of your wifi antenna. The 3g model is known for the overheating battery which in return eventually is the cause of your antenna to disconnect from its mount.