[kingston73]

Was just surfing some of the Tmo G2 reviews and found some people saying they need to update their sim card to take advantage of the new 4g speeds. Is this true for going from an older BB like the 8900 to something new like the 9700? My SIM cards probably at least 6 years old.

[MidnightDraven]

Nope.
There is no current blackberry that has 4G.

[dc/dc]

For the record, HSPA+ is not 4G. Don't believe the hype.