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A SIM enables you to use mobile network services such as voice calls, text messaging and mobile data.
Find the opener for the SIM holder and insert the opener into the small hole next to the SIM holder.
Remove the SIM holder from your phone.
Turn your SIM as illustrated in the first SIM holder and place it in the SIM holder.
Turn your SIM as illustrated in the second SIM holder and place it in the SIM holder.
Slide the SIM holder into your phone.