Don't throw away your old flip phone – do this instead

Summary
With smartphones serving all purposes, an old flip phone, especially a SIM-less one, may feel useless. However, this couldn't be further from the truth.
Description from Engadget.
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Don't throw away your old flip phone – do this instead
With smartphones serving all purposes, an old flip phone, especially a SIM-less one, may feel useless. However, this couldn't be further from the truth.
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