TruPhone networks questions
 

I know that TruPhone/Tru uses T-Mobile in the US & has no domestic roaming. Does anyone know if Tru in the UK & Australia are limited to certain networks there & if so, which ones?

USA info
 

Just curious, how do you know they don't have 'roaming' in the US? Roaming defined as using what prepaid T-Mobile 'roams' on vs T-Mobile owned network facilities. I don't know which is true in the US. Interestingly, Tru rep says in their forum answering the question:"Which US network does Tru use?"
Later it says that they are trying to open up the AT&T network for all customers.

A friend of mine who has one of their SIMs can't register on either AT&T or the former Unicel GSM coverage (now owned by Verizon). I doubt they'd easily get full access to AT&T though, as their data rates undercut AT&T's own prepaid rates.

My truphone sim always show Tmobile in the US.

Vodafone in UK

Other UK networks won't register on your SIM?

They said that they use Optus in Australia.