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SIM problems: Do SIM cards have an expiry date? Should you replace yours if it gets old?

When it comes to upgrading mobile phones, we often buy a new one without a second thought. Yet, we rarely consider the SIM card that has been quietly working inside the phone for years. Does a SIM ...
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SIM lock on Android: How it works, what it protects and why you may want to enable it

Losing an Android smartphone can create problems far beyond the cost of replacing the device. Your mobile number may be ...