Same network, Iphone 5 only receiving Edge service, Iphone 4 receiveing 3g service?

Running IOS 6.1.2 on Iphone 5, 6.1 on Iphone 4
Both on O2
Can't get 3g service on iphone 5. Iphone 4 can and they are both in the same room, any ideas why?

First check your settings to see if 3G has been disabled:
Settings>General>Mobile/Cellular Data>Enable 3G should be on

If it is already on, it could be a case that you are slightly closer to interference (ranging from old tvs to Wi-Fi routers and even microwaves) or that you are covering the bottom-left corner of the iPhone. I'm not 100% sure this got patched with the iPhone 5 but covering the bottom-left corner (where the antenna is located) knocks out a lot of signal, as does shiny jewellery near the corner.

  • Wi-Fi on iPhone keeps saying unable to join network (my network name)? How can I fix this! It's been like this for a week but it works on my laptop fine. I tried unplugging it for a few seconds, I tried resetting network settings, I tried turning my phone off then on again, and I know I'm typing it right. I even typed it in upper case AND lower case. Does anyone know how I can fix this?
  • Why am I only receiving texts when connected to Wi-Fi? I have an iphone 4, and I can only receive messages when connected to Wi-Fi! I can send them, but i only receive them when i get home or when i have Wi-Fi. Also, i can't send texts to my friend's ipod without Wi-Fi. Why is this happening & should I go to the verison store? (its not the cell service thats the problem because i can get calls)
  • Verizon s7 edge switch to metro pcs not receiving some texts? I have a verizon s7 edge phone that i recently switched to metro pcs service. I'm not receiving some texts from iphones and sms texts. I have tried many ways to flash firmware 935u using odin without success. Verizon said phone is NOT carrier locked. Metro pcs people don't know a solution. I have searched the internet for existing solution and have not found one that worked.
  • Not receiving notifications or able to enter some apps on my iphone because network problems? Recently, i haven't been able to go into some apps due to network issues. At moments, I'm able to. I can go to safari and it can go slow or normally. I've taken the plug out of the router and placed it back in, turned off my Wi-Fi connection on the iphone. I don't know what do do… When i was connected to the Wi-Fi at my school, everything went normally--received notifications and was able to msg as normal.