[LeEco Le Max 2 Guides, News, & Discussion] RandyT2:
The back story is that I bought 2 of the Max 2 phones, one x820 and one x822, one of which was supposed to be grey, but the seller screwed up and sent a rose gold. So I have two in that color. The wife fell in love with her phone, and I really liked the build quality, as I have broken lesser phones. Otherwise, I probably would have dumped them and bought something else.

So here's what I have found so far:

AT&T: If you are in an area with good coverage (multiple towers or access points), these phones will probably serve you well. In my case, I was not so lucky. My home usage is in an area that is too close to the only tower in my area. You read that correctly, I am too close to a tower. Full bars, but unable to make or receive a call on 3G. And if you happen to share my unfortunate circumstance, then there are no options to make the phone work for you, with the exception of a microcell, which has very limited range in such a situation. No WiFi calling, and while LTE works perfectly, no VoLTE on AT&T with this phone makes this a non-starter. If you can work within the limitations of the network, any of the available ROMS will likely work well.

T-Mobile: This is the best carrier I have found for this phone, if you are not concerned with the lack of LTE in areas where T-Mobile does not have native coverage. You must also enroll in a pre-pay and autopay plan, to make sure that you will not be billed roaming charges in these areas. While I am still in an area served by AT&T, T-Mobile offers WiFi calling features which actually work with the US 16s ROM on my two phones. Not only does it work, but it works well, with HD call quality between two capable devices. Call quality is even improved by the WiFI calling to standard devices. This solved my issue of the phones not working in my home location, and they still work fine on the AT&T network (used by T-mobile for roaming) a couple hundred meters from the problem area. I also recently visited an area served natively by T-Mobile, and the experience was even better. Fast LTE data, and unlike AT&T, when a call is made while connected to LTE, it does not drop to 3G. The phone stays on LTE and VoLTE works great. Even when calling landlines, and other non-VoLTE capable phones, the phone stays locked onto LTE frequencies. Again, with the US 16s ROM. Until developers can incorporate WiFi calling and VoLTE as implemented by this ROM, it's really the only option if you need both of these features. VoLTE may work with T-Mobile on other ROMS, but you may experience issues in some areas while roaming off of their network.

So I have finally found a workable solution which allows me to keep and make good use of my X820 and X822 phones, and that was switching to T-mobile. I feel that this company is simply structured better to support unlocked, lesser known phones. And based on my limited data usage, I'll probably even save $20 a month (bonus.)

A lot of this information is scattered through multiple threads, but I thought it might be a good idea to have a dedicated thread to discuss or share real experiences with carriers in the US for the x820, X822, x829, etc... phones. It would be particularly interesting to know if someone has actually been able to use these phones on the Verizon or other CDMA networks with a SIM card. All of this info will be helpful to others.:good: