Best practice international GSM setup

[gkeeper]

Thank you for info, i will keep the Piranha Sim on the T-Mobile network and update on return.
I received an email about rates in Canada, they seem to have lost Direct Dial, but they now have reduced rates on Call-Back, which are pretty amazing for roaming.

[wolfbln]

As you come from UK, why don't you simply take a Three UK Sim card for the US? It roams on BOTH T-Mob and AT&T. I could verify this in 2014. Speed is up to 3G only. The US is a so-called feel at home country.
I know Three is tricky as a recommendation for the UK, but roaming in the US is great. UK domestic rates are much lower than AT&T's.
Coverage depends not only on network but on the frequencies your devices works. AT&T is generally better. T-Mob on 1900 MHz in key markets on 3G, in other areas on 1700 MHz AWS which is not supported by many European devices.

[rfranzq]

Originally Posted by gkeeper

Thank you for info, i will keep the Piranha Sim on the T-Mobile network and update on return.
I received an email about rates in Canada, they seem to have lost Direct Dial, but they now have reduced rates on Call-Back, which are pretty amazing for roaming.

You just need to keep the default profile for T-Mobile.
Glad you got the email about Canada.
So the rates are lower now, then?
I did not have a record of what they were to compare.
And now, no having to switch profile to get Rogers anymore.