What could be wrong. 1. Wrong APN settings (check correct from Settings->mobile data-> long press "internet" to get it open and verify that you use correct apn to get 4g. 2. Faulty HW - LG nexus 5 hw sukks azz. My problems http://talk.maemo.org/showpost.php?p...&postcount=125 And check this https://youtu.be/OPuCmfhzgbg?t=10m50s 4G antenna migth be loose. 2G and 3G use different antenna cable. 3. No 4G coverage in the test area...