My HTC EVO 4G LTE is having a major problem. When connected to my home modem it will not connect to the internet at all. When I disconnect wifi in the settings the phone will crawl along at Sprint 3G speeds. Laptops, tvs, chromecast and Roku are all working properly from the same modem. I've reset the modem, restarted the phone numerous times, just updated the phone (was happening before and after the update) and still no luck. I've scoured the internet looking for answers but nothing so far. Can someone please help me? Thank you so much.