Notes about the T-mobile version of the OP7 Pro (and the 6T for that matter):
It can be unlocked if paid in full after 40 days of postpaid usage. The T-mobile device is typically $100 cheaper on sites like swappa.com (swappa is currently giving a free 3 month mint mobile plan and sim with any purchase made there) than the international version however it CAN be converted into an international with a few quirks and requirements.
You will have to install the international software onto the device. There are threads on how to do this in the OP 7 Pro forum on xda-developers.com. [ https://forum.xda-developers.com/oneplus-7-pro ] The phone needs to be sim UNLOCKED before you convert it. If you don't listen then when you want to unlock it you will have to first convert it BACK to a T-mobile version then unlock. It will not come with the nice glass screen protector that the international does because T-mobile wants to be able to sell you one. You should get one ASAP to ensure scratches and impacts are on the screen protector and not your real screen. Same for a decent protective case. Both are cheap if you have the time to wait on them from aliexpress, ebay etc. You will need to purchase a $5-7 dual sim tray off ebay or similar sites to replace the single slot tray in the t-mobile version.
This will allow you to get over the air updates directly from Oneplus however full rom's will still need to be modded before installing to handle the converted device. XDA has a quick tool that does the work so it's not difficult. One major difference between a converted t-mobile device and a true international device is the converted one will have the SAME IMEI for both slots. A real international device will have unique IMEI's for both slots. Don't run both slots on the same network if they have the same IMEI (with the exception of T-mobile and it's MVNO's because apparently THEY don't care) because it could be flagged as a phone being cloned.
This article is excellent and points you to where you can Download the best GCam Mod (and associated config file for your version of the phone) for OnePlus 7/7T, 6/6T, 5/5T, and 3/3T. https://www.rprna.com/apps/downlo...gcam-mode/
The night mode shots are amazing. I've taken pics where the viewscreen showed total black and it's post processed all sorts of details. Portrait works great. There are newer versions of this mod but they are not as stable.
Please pass this info on to oneplus enthusiasts and add to it if I have left something out. -- FameWolf