well in their defense , they said new sim card in respect to at some point in time they changed how thw sim cards were made and was concern if i had an old one seeing as I've been with then for years...
ugh I wish I got speeds like that northern cali speeds suck ...
in sacramento I get maybe 1mb if I'm lucky usually around 0.85mb/s
sent from my G2X with no regrets
Older SIM cards, unlike the newer ones, have an activation limit (usually ~90,000 or so). Once this limit is reached, the SIM card will not connect to the network anymore. The 'activation' event occurs each time your modem connects to a new cell radio on the towers. This wasn't a large issue with GSM/EDGE because they had a larger cell radius and your phone would use data less. With HSPA(+), your phone can make hundreds of connections in a day, sometimes thousands.
First off - there is supposedly a problem for Wifi calling and the G2X and the TM9177 sim card,
many seem to find that switching to an older TM9073 (or TM9035) SIM card fixes the wifi calling problem.
I had the older TM9073 which worked great for 2g/3g/HSPA+/wifi calling- but it died on me while traveling for work, and I was fortunately able to stop by a T-mobile store, and they gave me a new SIM --- the TM9177 --- which works fine for 2g/3g/HSPA+... but wifi calling is a mixed bag, it works on some ROMS, but not otthers.. whereas before the TM9073 works for all ROMs.