When you buy a cell phone you also need a company to provide cell phone service to that phone, so yes, you will need a plan in order to receive cell phone service. However, there are two kinds of plans. One that requires a contract and one that is called the "pay as you go" or "prepaid" plan. So you do not have to have a contract when you buy a cell phone.
Trade an item for the same value, or win a competition prize to then sell it and buy a phone. Go to an auction. Go to a old scrap items place and see if you can find a phone. Ask a old shop if they have cell phones which can be discarded. Play games on the internet where you can win free phones. When a friend asks you what you want for your birthday, say…
If you buy a cell phone and it breaks and you want to just buy a new cell phone but your plan is still going when you but the new cell phone do you need to pay the retail price or the reduced price?
retail price but there are always phone stores that sell them for a decent price, or online I would not pay retail and buy a pre-owned phone to get you through your contract. You should be looking for an unlocked cell phone. With an unlocked phone, you can use the phone with any sim card in the world. A great site for unlocked phones is http://www.bigtimewireless.com
Iphone's from the Apple company do not offer spare parts for their Iphone cell phones. One cannot buy a new phone battery, but instead buy a mobile phone charging pack to charge ones phone when they are not near an outlet. One can buy a mobile phone charging battery at websites or stores such as Bestbuy or Amazon.
You can use a credit card\debit card to buy the points. Or you can buy them through your cell phone, but you need to be able to access the internet through your cell phone and the points get added to the cell phone bill. And you can buy a Facebook giftcard at certain stores. I know Gamestop and EBgames sells Facebook giftcards.