Yeah, I've got mixed answers on it. Several more techie places list it as a HSPA 21 device. But several places list it online in their descriptions as a 42 device. I asked a TMo customer service rep when I tried to get it unlocked and she noted it was a DC HSPA device. I don't know if its possible for me to tell in the field test mode or not.
As for unlocking, they said I needed to wait 7 days before they'd unlock it. I might be tempted to grab a AT&T MicroSIM, activate it on my iPad with my Mobile Share plan then stick it in the 521.
As for unlocking, they said I needed to wait 7 days before they'd unlock it. I might be tempted to grab a AT&T MicroSIM, activate it on my iPad with my Mobile Share plan then stick it in the 521.