Tell me about my Samsung Katalyst t739
 

The phone has hotspots @ home (wifi).
I read reports that it will connect to wifi with the phone in airplane mode allowing a person to make free international calls.
Does this work for calls from Europe back to the US?

What if I have a SIM card in it other than T-Mo?

The phone is unlocked.

I think I've answered my own question. I took the phone down the street to Starbucks parking lot. I turned "airplane mode" on and hit "connect". It took several seconds (perhaps a minute) to connnect. I dialed the other phone I had with me....it rang.

This is amazing to me. I have a prepaid SIM in the Katalyst with no provision for wifi. This makes the Katalyst much more valuable to me when/if I travel "over there".....and I only paid $20 for it on CraigsList.

Yes, all T-Mobile USA SIMs work fine with it & at least for now, unlike some other UMA carriers, you CAN use the feature anywhere in the world & get home rates (as it acts as if you are home whenever you are connected to WiFi).

I'm sorry for the lack of knowledge but I've never heard of this concept until I started to investigate "hotspots @ home" when I bought the phone a couple of weeks ago.

So, I have to have a T-Mo SIM in it for it to connect to wifi?

How do folks carry extra SIM cards when traveling "light"?

oh, Yes. Nice feature. I used my tmobile prepaid sim in a Nokia 6086 to make calls back to the US when I was in Jamaica in April. Using the resort's free WiFi.