I replaced the screen and digitizer on my Galaxy S4 (i545) today. It's been out for a couple of days. Before now, I've never had a problem with 4g conenctivity and I'm trying to figure out if maybe I tweaked the LTE antenna when transferring the components to the new screen assembly or if there is actually a connectivity problem with the network itself. Is there an easy way to test this? I don't want to disassemble the phone again if it's not the problem.