Unlocked L640 on T-mobile who will send OTA upgrade to Windows 10 Mobile?

[Windows Central Question]

I am thinking of using the AT&T unlocked go phone Lumia 640 on T-Mobile network. I am not sure if I will ever get update to Windows 10 mobile. Anyone has any ideas?

 

[T Moore]

AT&T does not pass on updates to Go Phones. Don't know your carrier. want a large of smaller phone
Shop at amazon, ebay or what