Set Wi-Fi sleep policy to "Never"

On your Android phone:

For Android 2.3 and earlier

1) Navigate to Menu > Settings > Wireless & Networks > Wi-Fi settings> and select the menu button again.
2) You�ll be prompted to either scan or select advanced. Select �Advanced�
3) Select �Wifi sleep policy� , and you will have a couple of options to select from. Choose �Never�.

For Android 4.0 (Ice Cream Sandwich) and later:

1) Navigate to Menu > Settings > WiFi and select the menu button again.
2) Select Options, Advanced
3) Set �Keep WiFi on during sleep� to �Always�

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