Owned this phone, 8x by HTC, for a year now and the Verizon/HTC experience gets worse, not better, over time. From random errors like No SIM Card, can't send text, and can't connect/sync to MS Exchange Online/Office 365 to sync email, calendar, contacts. This "smart phone" is primarily a communication device. Sure it can play music and games, take pics and vid, but for me, if I can't make or receive calls (No Sim error), can't text, or can't receive and send email when I need too, this phone and the Verizon service I am paying handsomely for is useless. I notice these issues mostly when phone is switching from LTE to 3G and 1X. I live/work in an area that is solidly red according to Verizon's coverage map but as we all know, there are spots around every corner where coverage is sketchy at best. At my office, my phone jumps from LTE to 3G to 1X randomly all day. It's during that network switching the various communication services on the phone get hung up from time to time forcing a power down to get them to behave properly. Have never had this problem with any other smart phone at this location.
These are not new issues, they have been going on for many months, with no urgency on anyone's part, except the customers that have to pay their Verizon bill each month for a great looking paper weight that might allow them to make calls and send emails/texts from time to time.