Originally Posted by link68759
ATT has separated data plans into specifically 3G and 4G. They cost the same at the moment, but they could raise the monthly cost of the 4G data plans, which is probably why they are advertising some phones as 4G that aren't actually 4G...
The 4G plan is for marketing and data collection purposes, it actually has no effect on what your phone can or cannot do in terms of your data connection.
You can have a "4G" phone and have a regular data plan and your data speeds will be no different than with a 4G data plan.
Giving the same feature multiple names is a common marketing tactic and also helps AT&T get data on how their products are being sold to customers. And yes, it also means on day they could throw extra charges on certain plan types, but so far they have yet to do that.
Kinda like Sprint's extra $10 Premium Data pack they force onto smartphones. All their phones access the same data network, but they just charge you a little more for having a smartphone yet the Premium Data pack really doesn't do a thing at all to change how data is served to a feature phone or a smartphone.
Originally Posted by mmian
Do any of you know if my old sim which is labeled 3g from my focus will even allow 4g speeds? I put that old 3g sim into my new HTC Titan and the fastest i've gotten is 3.25Mbps down but I consistently get 2.5-3 though. Even with full bars around 3Mbps down.
The only phones that use a new SIM card are AT&T's 4G LTE phones. Any 3G phones sold in the past 5 years or so should be using the regular 3G SIM card that works fine with AT&T's "4G" plans/phones. "4G" is nothing more than a marketing tactic for 3G HSPA+.