Today on my lunch I was sitting in my car just at the edge of my work's wifi and the signal was really poor and I needed to send out a quick message over Discord. I turned wifi off to connect to mobile data so the message would send. Then I FORGOT TO TURN IT BACK ON. I went back inside, continued watching my partner's Twitch stream all day long, and incurred a Ting data charge of $60 in one afternoon.
I didn't have an auto cutoff set up. Stupid, stupid, stupid. I used to have one set to 100MB (the smallest bucket on Ting) but I found on those rare occasions when I did hit it... it cut me off! (Duh) But in the most inconvenient times, I'd be somewhere and REALLY NEED mobile data and not be able to get it turned back on (which I could do at a computer, but not on the road). So I just decided to forego the cutoff, because what's the difference between $3 and $10 really, when you really need the internet access, right?
FACE. PUNCH.
I have now disabled mobile data on my phone itself (not through Ting) so if something HAPPENS and I need it for a brief time in the next 23 days before the billing cycle ends (*cries*) I can turn it back on easily. After that, I'm setting the cutoff at 500MB. Because while I have occasionally gone over 100MB from normal use and needed to move up to the $10 bucket, I've never crossed the 500MB limit with intentional use. At least that way if I do a STUPID STUPID STUPID thing like I did today, it will shut off my connection and I'll be forced to go "hey, what happened to the internet?"