One thing I will say, I have an iPhone 11 Pro Max, and when I went overseas, it was a nightmare using it. I promised myself I will never purchase another iPhone unless purchased from Apple Online or Apple Retail Store. What they don’t tell you is Telstra, Vodafone & Optus, have their phones network unlocked for use within Australia & NZ. But when you travel abroad and try use dual sim (Telstra sim with Flexiroam eSIM), it wouldn’t activate. I spent three hours in the UK Apple Genius Bar to discover this problem. Ended up using some dodgy website to get my IMEI unlocked.
Pro Tip: Buy only from Apple and save the headaches of these network locked phones.
P.S.The wait for 12 Pro Max is killing me. I’d have a bright pink one if it meant I could have it now.