I live in the US with the Oppo Find X9 pro. I went into the OS Updater app, NOT my phone settings region, changed my "region" to IN and I got the notice for the ColorOS 16.1 update. I am downloading it now and going to install it.
So I have had the Oppo Find X9 Pro global variant for 4 days now in the USA. I bought it on Swappa in mint condition, screen protector on it, it came with two cases and the UK style supervooc adapter. I am on US Mobile and I have switched between all 3 networks to see which is the best. As far as speeds, I've had the best results on Dark Star (ATT). I would then say Warp (Verizon) comes in second and Light Speed (T-Mobile) in third. Obviously this is based on where I live but in the end, this phone works on all 3 networks. Dark Star (sim card) and Light Speed (esim) worked flawlessly. On Warp I am using a SIM card as well. While Warp works fine I've run into little issues such as after every restart of my phone it takes a few minutes for it to connect and then came RCS not working on Google messages. What worked for me was to follow the instructions in my photo attachment. No matter my network, I never got more than 100 Mbps download which in all honesty is fine. The actual signal strength is great. Again, I've only had this phone for 4 days now so where I have been able to travel has been limited to test my speeds. My old phone is a Galaxy S22 Ultra and what is funny is that phone and this my X9 Pro on Warp has the same speeds at around 70 Mbps. I thought for sure CA would give me faster speeds on my S22 Ultra. With that said, I absolutely love this phone. The battery lasts forever and ColorOS is so smooth. I took it to an outdoor concert last night and it produced great photos and videos. I did have some small issues where it seemed the viewfinder was giving me some blur as I panned around the stage. I love having IR as an option. Visual voicemail works across all three networks. Lastly, for everyone who says the speaker is horrible is being over judgemental. It isn't the greatest but it is by no means a deal breaker and you can always get the equalizer app to help. Don't let that sway you away from it. I've used Android Auto with no issues. That's about all I have for now. Feel free to ask any questions.