Does GSM work internationally?

Most GSM phones outside the U.S. (except in Japan and a few other countries) operate on the 900 MHz or 1800 MHz GSM bands . American and Canadian GSM networks work at the 850 MHz or 1900 MHz bands. With an unlocked, quad-band GSM phone, you’ve got all four bands covered.

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Can I use my US cell phone in Africa?

Most US phones do not use SIM cards and for those operators that do (like T-Mobile) your phone will be locked on the US and won’t work. Instead you can borrow, buy or rent an unlocked phone that accepts a SIM card. In South Africa it quite easy and fast to rent a local phone and SIM card in the Johannesburg airport.

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