What happens when you reset data?

Today I was on my phone and checked my data and it said I had 221MB used(I have AT&T and I have the 300 MB data plan) and ithad the option to reset the statistics. I have an iPhone 4S BTW. Now it has 0MB used and I don't wanna cut my data on because i don't know if it will charge my bill if I use it again. What's gonna happen? My phone bill is due on the 1st of October(I'm 16)

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  • When does data for a iphone from Verizon reset? And what uses up data? I just got an iPhone and I'm getting messages that say that the "usage reset date" is 10/10. Does that mean that is the day my data will be reset? Also, what uses up data? All I've been doing since I got my iPhone is texting and looking at a few things on the internet but I'm always connected to my Wi-Fi.
  • What happens with iPhone reset? My daughter won't give me her iPhone pass code. Knowing that she has things on their that could effect her life. I don't have the itunes she syncs it with. If I were to reset it or have apple reset it would everything on it disappear? Including messages and apps?
  • What happens when you reset your iphone? In settings, when i press reset all settings or iphone. Will these erase all my apps, photos, and videos from the screen? I'm trying to find a way to clear all the problems on my phone bc lately it says all my storage is full so i can't do anything, but its not full! I don't know how to fix this. Will reseting my phone help and how can i fix or reset it in settings so i won't lose anything
  • What happens when you reset your iphone? - 1 In settings when you reset your phone, what happens? I know that it will delete your apps, and music, and pictures and stuff like that but will it give me a new number? Do i have to take it to the apple store to get it working again? I'm going to reset my phone and i'm just wondering what will happen.