The phone is an upgrade to my old phone (Motorola One 5G Ace) and my current Motorola G 5G. It's locked to T-Mobile bands, so choose wisely, it's irrelevant to me as I am a T-Mobile customer. The SIM switch worked perfectly, no complications and I was good to go using my data plan. 12 Gigs of RAM is true and the most I've ever seen used is around 7.2 Gigs, so even a phone with 8 Gigs is fine, the processor is what counts. The processor in this phone is phenomenal, coming from my prior 2 phones, for it's price. I wait less for apps to open, in comparison to my previous phones, battery life is great as a plus due to the Snapdragon 6s Gen 3.