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slip it into the card holder.
Caution:
Install your WCDMA or GSM SIM card into SIM slot 1.
Install your GSM SIM card into SIM slot 2.
3. Hold your microSD card with the metal contacts facing down
and slide it in.
NOTE:
Some applications may require a microSD card to
work normally or may store certain data on it. Therefore, it is
recommended that you keep a microSD card installed and
not remove or replace it randomly.