I’ve done this almost from the very beginning (back in the 90s) and always had very small mobile communications costs because I could easilly change providers and plans and even do things like use a local SIM card whilst abroad to avoid roaming costs.
For my past 3 phones I just bought straight from the manufacturer.
I recommend it and hope phone unlocking gets pushed through despite their whining
I’ve done this almost from the very beginning (back in the 90s) and always had very small mobile communications costs because I could easilly change providers and plans and even do things like use a local SIM card whilst abroad to avoid roaming costs.