I just exchanged mine for a new one and 4g connectivity is night and day. my first one would get good 4g outside but would almost always switch to 3g when i went indoors. also, it would take forever to even get data connection once i lost it, such as coming out of an elevator or toggling airplane mode. the new one connects pretty quickly. at first i thought it was due to weak 4g in nyc due to the tall buildings, but it was a defective phone. i realized this after comparing my phone to my gf's nexus, which always got a 4g signal. i tested it out in large buildings in midtown east/west, union square (at the cosi) and the financial district. i can confirm that you should be able to get around 2-3 bars of 4g at the cosi in union square if you want to test your phone out. if it doesn't work there then most likely you have a defective phone.