Sim Only Contract There are months when you don't use a lot of our phone's credits. Sometimes, you only use up half of the call or text credit alloted to you by the network for your pay monthly mobile phone. However, even if you don't use up your fixed credit every month, you'll still end up paying the tariff because you have a contract that lasts either a year, 18 months, or 24 months. It seems like a waste of money, right? If you agree, a sim only contract is your best option.

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