hi. thanks for reading this. i just received an iPhone 5 ATT. I have an issue. On my 4s, i had great reception at work on 4G. Now that I have LTE enabled on my iphone 5, it get 1 bar, sometimes NONE at work. Is there no seamless connection between LTE and 4G in that if my phone has bad LTE signal it will automatically hop to 4G? if i turn off LTE enable at work, i get 4g and it works fine. do these all work on different spectrums? by having 4g doesn't gaurantee me reception if i have LTE enabled?