Google Pixel 6?

I should clarify a few things that should help.  The pixels when they launched were never billed as a fully unlocked phone.  We're you originally a Sprint customer or Tmo?  Back in the day when Google was launching the pixel line they went looking for a dance partner because back then if your name wasn't apple or Samsung the main way to get traction in the market was to partner with a carrier.  Sprint passed and Tmo wasnt interested.  The pixel 4 for example was a Verizon based device that also had some flexibility to go on other networks (game). What I mean by that is it was especially optimized for Verizon networks but did also work on Sprint and Tmo and att.  They were very clear with what bands it was capable of.  Also keep in mind at this time Tmo was doing a major network overhaul.  There were many bands on all networks that worked with the pixel 4 but Tmo especially who were expanding their network and Sprint who were deploying 4g like they didn't pick the wrong thing the first time (wimax) were enhancing as well.  One of the points of confusion for Tmo customers (and it still is) is as Tmo builds out it's network it's doing so on new bands.  When they show their network footprint they do so assuming you have the latest and greatest but older devices especially can't hit all those bands and it makes their network seem smaller and slower (because it is if you can't get the newer bands of network).  As previously mentioned when pixel 6 is announced take a look at the bands it supports (they will publish them) and then compare them to TMobile.  I would highly suspect that this new pixel will be compatible on all the 4g and 5g bands that Tmo is currently using.  If it is (and assuming Google doesn't release network specific devices (I highly doubt they will) then it doesn't matter where you get your phone from.  In terms of iPhone, what iPhone did you have?  Apple has been making iPhones for us sales that are fully compatible with all networks for... Ehh I dunno 4 or 5 years now... Maybe a little longer.  They did market and have different models for different carriers buttttt the radio receiver in them was entirely the same across all models.  That being said... The same above scenario still applies... Say you had a 4 year old iPhone from att and switched it to TMobile.  The issue here isn't that you had a att iPhone. It's that 4 years ago some of the bands that Tmo is using today didn't exist 4 years ago and thus even if you had a TMobile iPhone you'd be missing some of the possible bands to receive Tmo service from.  This has been less of an issue on the Verizon side as theyve had less network band movement .  But sprint and especially Tmo have had a lot of flex in the bands that are deployed for use by customers.  When in doubt take the specific model of whatever phone you're holding and look up what TMobile bands it's capable of finding. Then pull up a lost of all the current bands TMobile is using and see if you have some differences.