I will suggest you keep the old bill for one month. The new bill to arrive will most often indicate whether the old balance was paid and the date when the old bill was paid.
However, if your teenager's use of the phone is large you may wish to hold onto these bills until they have grown some. The time will come when your child will someday angrily scream , "You never buy me anything"! This is the time to run to the closet where you have stashed all the old bills that will show you and your child that you have paid a fortune for all their nattering.
Keep a rolling 12 months of all your bills.
http://www.bankrate.com/brm/news/mtg/20000518h.asp
YOu should keep bank statement for 7 years, in case you get audited
Hold on to it for as long as possible.
credit and debit cards
Keep a rolling 12 months of all your bills.
http://www.bankrate.com/brm/news/mtg/20000518h.asp
I would say for the length of the contract. That way of you ever fond your being over charged you can go through the bills to know what to ask back.
You should keep utility and credit card bills for 60-90 days because that is the maximum lenght of time to report any disputes. For credit cards, keep at least a year if you purchased any deductions.
As soon as it clears from the bank,than it can be tossed,the bank as it on file.
In Canada you should keep all financial files for 7 years as the government can go back this far to audit.
It shouldn't matter about marriage or not - if your together and both contributing that's the way relationships are - keep paying your bills.
If you use your medical bills to claim a tax deduction, keep them for a minimum of three years afterwards. But if not, you can shred them immediately.
eternity
The temptation for cell phone owners is to let cell phone bills get out in front of them. Instead of paying them on time and just having to pay the base fee, many people will wait too long and get caught paying the late fee. Late fees and disconnect fees are very high and are expenses that you don't need to take on. If you make cell phone bills online automatically, things will be much easier for you. You can save hundreds of dollars every year by not having to pay the extra fees. Keep this in mind when you plan for the long run.
Until they are paid. There isn't really much reason to keep them, unless there are some items that can be deducted from your income taxes. For example, a couple of years ago, the IRS finally gave up a long series of court battles and allowed citizens to deduct an illegal telephone excise tax. The catch was, you had to have copies of your phone bills to calculate the refund. If you had the old bills (for three years back) you could take the deduction. So in SOME RARE cases, it MAY be USEFUL to keep three years of old utility bills. But there is no requirement to do so.
As long as your are switching in a local area, then this should be possible. The technicians at the store you purchased your prepaid phone from should be able to make the switch, as long as you haven't already canceled your service before you port the number over.