iPhone will hang onto signal for hours of calls, but not when its in standby?

[dontwalkhand]

Unlocked 3G using Ultrasn0w. The iPhone would hang onto a signal while on a call just fine, and stay on full bars. but on standby, the iPhone would always intermittently go to No Service and sometimes even stay that way every 5 seconds after "catching" a signal.

What is up? Anyone have trouble? It is 3.0 firmware as well. It doesn't make sense that I can stay on a call and go through places with crappy signal and have it work, but not even stay connected to the tower on standby....AND ITS THE SAME LOCATION TOO!

 

[dontwalkhand]

Bump Help!

 

[xeno911]

Idk why ppl aren't responding. I made a similar post.

I had the same problem but I just re-inserted my SIM card and then reboot my phone just to be safe.

Have you had any problems with people hearing you on the other line when you make/receive calls?

 

[dontwalkhand]

Idk why ppl aren't responding. I made a similar post.

I had the same problem but I just re-inserted my SIM card and then reboot my phone just to be safe.

Have you had any problems with people hearing you on the other line when you make/receive calls?

My personal iPhone 3G is hanging onto the signal just fine, I am trying to fix a friend's, and others can hear me just fine. My friend's iPhone has the problem, when you hang up, the signal would go away in a matter of seconds, without you even walking around.