Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to get minutes for free on prepaid phones [title] Find a promotional bonus code. [step] A promo bonus code is like a coupon, in that you can give it to your prepaid phone service provider in exchange for whatever promotion the code is associated with. On occasion, a promo bonus code may entitle you, the code bearer, to free phone minutes.

Ending1: Popular promo codes include " 5.5 " and " 22. " [title] Contact your prepaid phone company directly. Ending2: [substeps] For a promo bonus code, look for the number of free minutes you have by asking the customer for 0. You also should see the code issued on the card itself. Ending3: 1 way to find these promo codes is to search online for codes pertaining to your particular prepaid phone service provider. [title] Qualify for a program that provides free prepaid phones and free minutes to low-income applicants. Ending4: [substeps] It's best to turn off your phone to devote most of your free time to the creation of the promotion code. By doing this, you can make enough money on your phone to tip your prepaid phone carrier.

Answer format: ending1/ending2/ending3/ending4