I've only had my Idol 3 on Ting GSM for a couple days and haven't really traveled with it yet, but I've noticed that it is constantly going in and out of service, from 4-5 bars one moment to 0 the next. I'm trying to figure out if it's a phone issue or a service issue in my area. I'm in a GSM - 4G LTE area according to the coverage map, and I get the LTE icon on the Idol 3.
It doesn't seem to be a "death grip" issue, I've seen it happen when holding it only by the bottom two corners. When it gets stuck on no-service, going in and out of airplane mode brings it back, if only temporarily.
Anyone else on Ting GSM have an Idol 3 yet? If so, what have been your experiences? I've had nothing but great luck on Ting CDMA, and love the service as a whole.