Does data reset on the iPhone?

I had a Samsung about 6 months ago and my 1gb of data would always return to 0 on the first day of the month. I've had my i phone a couple of months and the data number has always stayed the same. Is it different?

Your phone can monitor data usage, but it is not how your data limit is set. The limit is set on the servers of your mobile phone service provider. If you want to know how much data you have used and have remaining there should be a number you can text!