My iphone 4s just keeps losing signal (searching)

I had this problem too (iphone 4S). Was fine for about a year and then developed it - searching... for network for about 30 seconds and then finding and holding the network for about 30 seconds only to drop it again and repeat.

Have just upgraded to ios6, know this comes with its own problems - but has solved this issue for me (24hours and counting...)

I had the same issue. My iphone would keep losing signal every 15 seconds. It says searching.. then it comes back and 10 seconds later the same thing happens. This would happen only when cellular data was turned on...turning off cellular data would fix the problem by itself...but then whats the point of having an iphone...

I found the solution in a very simple way. Yes, I didn't have to restore my phone to factory settings. so what i did was just 3 simple steps:

1.) Turn off cellular data, this will make your signals OK temporarily.

2.) Now turn on cellular data and go to the network selection in the settings menu. While the phone has signals temporarily (the signals would keep dropping, so you might have to wait), turn the network selection mode from automatic to manual. This is will give you a list of carriers in your area.

3.) Now choose any network from the list other than your home network. The phone will show "No service". Keep doing that with other networks..the phone will still show "No service". No switch back to your home network in the list. and you will have network. This time it shouldnt drop!

These steps worked for me and the phone hasnt dropped signals even with cellular data on.

Let me know if this helps!

I have a problem maybe you could solve. my iphone 4s was second hand and after I was put in boot loop I took it to a phone fixing place and got it repaired for 345$ and the I had the searching problem so clueless me wipes the phone completely and now the set up isint working on either the phone or I tunes......Help please and im not really looking to go to snother store if that can be avoided. Thanks

I had the problem of loosing signal in my IPhone 4 while I am calling. The solution is so simple. When you touch the lower left metal,corner (specially for lefty people), the antenna is there so you are weakening the signal. To solve permanently the problem, all what you need to do is to buy plastic back cover (at Ebay for $1.00).

I bought a clear one and my problem was solved since then.