About once a day, or once every other day, my 5 will suddenly lose service, drop to 1 or 0 bars, and the ATT logo, as well as the 4g or LTE indicator disappear. Anyone else have this problem? I am on Long Island, service is defintely not spotty here, and I can confirm this never happened on my 4 or 4s. Screenshot attatched.
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iPhone 5 intermittently loses signal and network logo
- Thread starter Cscottrun
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I lose my Sprint logo too, make sure the SIM Card is firmly seated in the tray and see if that helps.
I have this too but it has happened on all of my iPhones. I've always attributed the problem to the carrier. I'm on AT&T as well.
My girlfriend and I had this same problem, switched the phones and the replacements had the same problem. Went to AT&T and told them I was not happy and they let me cancel my 17 day old contract with no fee's and we ported over to Verizon. Verizon is working much better and we now have LTE 
I really don't think it is an iOS bug. I've had had it on all my iPhones as far back as the 4 that I can remember. I think it's just AT&T. I don't remember the specifics of when I happened. Most were not in crazy congested areas except for the last time this weekend during a college football game.
I had this happen to me last weekend at home. However, in my situation it was happening randomnly both on Saturday and Sunday. It hasn't happened since then, I believe AT&T was most likely messing with the towers, or it could've been the weather interfering with the antennas. Who knows.
However, today I experienced a data block on my iPhone 5. I had no data going through despite it saying it was connected to AT&T's 4G network. Reloading any app on my phone would just go in an endless loop. Normally if the cellular network is off, it'll notify you when you try to reload a page on Safari or update an app. This time, no notifications like so on any app. It was strange, a reboot fixed the problem though.
In Canada too and it happened on my 4 and now my 5 about once every few days but it comes back within seconds. I think its network reception issue too as it also happened on other older iPhones with other SIMs.