Hi
Jules3, welcome to the forums.
I quote the old addage "If it ain't broke, don't fix it!"
To answer your question, the SIM card will not change how fast your net connection is on your phone.
As for the 32 vs the 64, it's just the number of contacts you can save on the SIM that makes the difference is all.
So, do you have two SIM cards?
Did you get a SIM card w/the Treo, from the provider?
If you bought the phone from the provider as an upgrade, then it won't matter what SIM you use,
if they updated their records, which they normally do.
Hope that helps.
