I bought a Blackview BV9000 phone through Amazon, not the Pro Version, and it lists the following Specifications:
Networks:
2G: GSM 850/900/1800/1900MHz
3G: WCDMA 900/2100MHz
4G: FDD-LTE B1/B3/B7/B8/B20
In my attempts to purchase a SIM card with a Carrier that would work for this, I was informed that the ATT StraightTalk carrier would work with GSM, so I bought an STBYOP Kit, which comes with an ATT, a T-Mobile, and a Verizon SIM card each. The ATT and the T-Mobile Sim numbers aren't even recognized when I type them in for StraightTalk. Not through the Browser, not through the App. Nowhere. The Verizon one recognized the SIM Number, but the IMEI numbers for both of the SIM slots cause the server to inform me Service is unavailable.
I took to the internet specifically looking for a high-quality, durable phone that would still have a fast cpu, decent memory, and decent storage. In that respect, and in my opinion being the more intuitive Android build, I bought this phone only to find out later I might not be able to get it to communicate with Cellular Carriers. Are there any Service Plans at all in the US that might work with this Phone? Any at all? Like, if I have to buy a different phone that is "compatible" with US Carriers, I'm going to be immensely disappointed solely because there are no phones made in the US that meet the same standards as yours. If I have to settle for a different phone, I will be settling for a "fancy" phone that's extremely fragile in comparison.