I live part of the year in Herndon, Virginia, and part of the year in Panama City, Panama. I have had a T-Mobile contract for my cell phone for about 4 1/2 years. It is my home phone number in Virgi9nia. The first phone was a Samsung Katalyst with Hotspot@home and it worked almost perfectly through WiFi in the Panama Apartment to make and receive local calls in Virginia. Once in a while it dropped a call but I was very happy with the WiFi service. Last August I bought the Samsung Gravity because the Katalyst was getting on in years and I didn't think it would last much longer.
The Gravity performmed brilliantly until last Wednesday. Since then it has been impossible to connect the phone to my WiFi modem. I have spent countless hours on the phone with T-Mobile technical support but nobody can tell me what the problem is or how to solve it. T-Mobile says they aren't responsible for fixing WiFi problems outside of the US. The ISP here in Panama says that they aren't responsible for fixinging problems involving a US phone. Welcome to limbo!
Last night, I saw some blogs on this site on WiFi calling problems with an error message "W006.15 ISP or T-Mobile network error." My screen shows the same message but with the number W006.25. They tell my that this is also a 911 address problem. Last night, a T-Moble tech suggested to me that T-Mobile would no longer support WiFi calling outside of the US since T-Mobile didn't receive any additional money for international calls which these types of calls were, in effect. (This might be true since my Katalyst phone no longer connects to my modem.) He said that I would have to activate international roaming on my phone in order to use WiFi in Panama. The per minute charge for roaming in Panama is $3.59!
Last night I also saw a blog about the T-Mobile app "Bobsled" suggesting that this would solve my problems. Has anyone had international experience with this app?