How do I install the nano-SIM card in my ZTE Cymbal 2?
Power off your phone before installing the nano-SIM card. Remove the back cover using the notch at the bottom corner, remove the battery, then insert the nano-SIM card with the cut corner first and the gold-colored contacts facing down into its slot. Replace the battery and back cover when finished. (Page 15-17)
From the official Zte Cymbal 2 manual, page 15
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