Will I be able to use my phone to pay bills for Ranger School ?

You have an 8 hour break between each phase, however you should set up auto pay for all your bills now.

Sorry, but no

You have a regular pay check going to your bank from the Army. Hopefully your monthly bills don’t exceed your monthly income. If that’s the case set the bills on automatic payment. If you’re paying rent to a landlord who doesn’t accept electronic payment talk with your financial institution. They may be able to automatically pay the landlord out of your account. You’re not the first Soldier to have this problem. Ask your chain of command what they recommend. Also on post credit unions are very good at helping members. Consider moving your regular checking account there if you haven’t already.

Of course if you’re married simply allow your spouse to handle the money while you’re gone. My wife did a great job with the family finances for 22 years.