During my few months on an ST AT&T LTE sim, I could only use the tfdata APN and not the older att.mvno (or whatever it is exactly) APN. I never used 2.5 GB/month, so I don't have experience with throttling, but I did have a heck of a bad time with delayed push notifications and slow data (constant disconnects to Google's servers, even though no signal loss). I have since switched to a ST T-Mobile sim and push notifications are instant again and internet seems much more responsive. I'm not sure if others have the same issues with the AT&T tfdata APN, but if you do, and T-Mobile has decent reception in your area, I recommend trying the ST T-Mobile sim.
STOP INSULTING PEOPLE
Personal attacks and insults are not permitted here. Posting such messages violates Howard Forums rules.
I have removed the messages you posted that contain insults.
Thank you to everyone who did not respond to the insults.
Please do not include personal attacks or insults in future messages.
Moderator decisions are NOT open to public debate, so please do not respond publicly to this message. If you wish to discuss this matter further, please send me a PM.
Repeated violation of the Howard Forums Rules (particularly after you receive this warning) may lead to temporary or permanent bans from Howard Forums.