If I jailbreak my iPhone on an AT&T Next Plan, will it stop the plan?

I'm thinking about jailbreaking my iPhone. I'm currently using the AT&T Next Plan, and I'm wondering if jailbreaking my phone will make the plan void.
If possible, a source would be greatly appreciated.

No, It won't

No it won't void the plan but it will void your warranty

All jailbreaking does is allow you to modify the apps that you have on your phone. Jailbreaking has nothing to do with your contract. If you jailbreak your phone, you void the warranty of your phone, so if the phone breaks, you have to purchase a new phone at full price.