Toggle Mobile

[ronwi]

I am in the US - and the Toggle SIM will only roam on Tmobile, not AT&T. And yes, I have tried selecting AT&T multiple times in a row to overcome steering.

Lycamobile US uses Tmobile only as well, so I suspect they have some special deal with Tmobile. The fact that they have free incoming calls in the US without a US IMSI (I think they are the only mobile operator that does this) suggests a highly negotiated deal with Tmobile.

I have also activated a number of these SIMs in the US (I only kept 2 the rest were for friends.). I have found that it will refuse to register on any network when first taken out of the package and put in the phone. This is because at first it is in UK mode, and it seems to take some time to go into roaming mode. In fact, for the last one I activated I became impatient and went to the STK SIM menu and manually selected roaming. I then changed it back to Automatic later when I had more time.

Originally Posted by inquisitor

Either roaming on AT&T is blocked for toggle SIM cards or they do roaming steering to force your phone to TMo despite the worse signal strength. If the latter is the case you should be able to force your phone onto AT&T by performing a manual network search and selecting AT&T. If this fails repeat the search and selection process four times. If is still fails after the fourth attempt, you definitely can't roam on AT&T.

As long as you haven't changed your iPhone's default settings it won't establish an Internet connection while it's on a roaming network anyway.

If USSD (those codes containing * and #) works out of the US, you will be able to activate a data bundle. You can find out if USSD works by dialing *131# which should display your current balance. If it fails USSD probably doesn't work on the selected roaming network. In that case you could try registering on another network and try it again.