The Huawei Mate 10 Pro will finally be coming to the US despite a really shaky launch with a ton of problems. AT&T was supposed to carry the device but backed at the last minute just before CES. It was a bad look for Huawei, but since they already had plans for an AT&T model, they’re rolling with it.
As it turns out, the unlocked models that Huawei will be selling in the US are pretty much just AT&T phones. They’ll have the model number BL-A09, hinting at carrier compatibility with just a few differences from the original unlocked phones.
Unlike the international models, the US Mate 10 Pro will only offer a single SIM card slot. Naturally, a US carrier isn’t going to be happy with a phone offering two SIM options, so that’s why that’s absent in the States. We can also see a bit of weirdness in regards to carrier compatibility, too.
It’s an unlocked phone, so it’ll fully work on both AT&T and T-Mobile. No connectivity or LTE issues here. However, on AT&T, the Mate 10 Pro will support both VoLTE and WiFi calling, but on T-Mobile you can only expect VoLTE. It’s an odd choice, but it does fall in line with what AT&T usually does to their own carrier models. That does also sound like something that could be fixed in a software update, but if you’re buying the phone early for use on T-Mobile, keep that in mind.
source: XDA Developers