thanks for checking - I was using an older Samsung Vibrant, and it shows me two networks available, Truphone (Tmob I assume) and ATT, but gives the error message if I try to select ATT (after 30 secs or so of showing 'registering'). Are you saying some phones don't have the hardware, even if Android allows network choice? I did try 2-3 times.

With Piranha, you select online on their website, but 30c/min outgoing, 24c incoming in US for ATT.

PS
does your Truphone sim find ATT using "automatic network selection" in areas where Tmob has no signal?

Not using Android--just non-smart phones. Some phones do not show option of choosing network. For instance I have unlocked AT&T Huawei U2800A phones that have no option but find 'Truphone' as the network fine. It is 'automatic' with out the choice to turn it off. I have looked to find such a setting but have never found it.
It sometimes [at least two phones today in further testing after original posts] finds AT&T on startup where T-Mobile HAS signal. I am in southerrn Califorrnia [L.A. County along I-5 one third the way to Disneyland from Downtown L.A.] So, I do not know about no T-Mobile signal, but it finds AT&T even if T-Mobile is present.

"Persistence"
 

I have furthered played with [I mean experimented with] AT&T network connectivity with Truphone. Three phones that I have manually switched to AT&T network and then turned off. When, hours later, I turned them back on they connected to AT&T. This is what I term 'persistence'. Staying on the same network the phone was on when it was last turned off.

I have tried around eight GSM phones over the years with Truphone and have never been unable to choose AT&T. So perhaps, it is the phone?

that is quite normal, the last used network is stored on the SIM card and on restart the phone will try to get this network first - especially in roaming scenario this can speed up the network connection significantly when using a already known working network instead of testing trough all available ones...

Thanks for the explanation
 

Well, that explains 'persistence'.
That seems to cover more than 90% of my experience when in multi-network roaming situations.

was in Western Mass this weekend, in area that TMob map says should have coverage, but no signal even in the towns, and Truphone would not connect to ATT, even if I tried to choose it manually. I tried a few times again.

Google Voice app blocked?
 

Has anyone else had problems running the Google Voice app on Android while using Truphone? It works fine while I'm connected via Wi-Fi, but when I try connecting via mobile data I get a login error. I suspect that Truphone has blocked the app from connecting -- and if that's the case, it should be made known.

Truphone now also on 3G on AT&T in USA
 

I do not know what this all means.
Truphone is now also on 3G on the AT&T network in the USA.

Also more interestingly, instead of the T-Mobile network being called 'Truphone' in the list of networks, AT&T is now called 'Truphone' and the other is now called T-Mobile.

http://www.howardforums.com/showthre...1#post15897871

Incoming calls are also free
 

Just now noticed that incoming calls are free for US/UK sim holders using it in US/UK. It's probably been so for a while, but I am just now noticing it.