Zte Z291DL User Manual page 21

ZTE Z291DL User Manual
Type the old PIN code, and then type twice the new PIN code. Click Apply to confirm your
configuration.
NOTE:
Three times consecutive wrong PIN code entries will block the SIM card.
Power Save
Select Settings > Device Settings > Power Save. You can set Wi-Fi performance and Wi-Fi sleep to save
power.
Wi-Fi Performance Settings

Short Wi-Fi Range: Increases battery life.

Medium Wi-Fi Range: Intermediates battery life and Wi-Fi range.

Long Wi-Fi Range: Extends coverage of mobile hotspot, which will decrease battery life.

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