You would think that SIM-free phones do not need a SIM card to operate, however, the truth of the matter is that even when a phone is SIM-free, you will still need a SIM card to operate it. SIM-free just means the phone is not locked to any particular network.
If you search for it online, you will see that there are many unlocked phones being sold on Amazon and other online retailers. While they are good so long as you choose a highly-rated model, you do pay the full retail price when you buy.
Because the phone is not tied to any contract for installment purchase with the network provider, you have to pay up. Of course, if you have a credit card, you can pay on installment, although you cannot do it if you are buying online.
How much do sim free mobile phones cost? Well, that really depends on the brand. If you are buying an unlocked Samsung phone, it will cost you $275 on Amazon. On the other hand, if you opt for an iPhone, it will cost you $450. There are other brands that cost more or less within that range.
If you want to save money, make sure to buy an unlocked phone. Although you pay hundreds of dollars in the beginning, it does come out cheaper in the end. In the case of locked phones, the retail price is doubled. So, even though you are paying a low monthly fee, when you do the math, you pay more.
Aside from the low price, an unlocked phone is more advantageous than a locked one in terms of flexibility. You can use it wherever you may be in the world. So, if you are traveling, you only need to buy a local SIM.