Whenever I reboot, widget get lost in GO Launcher EX. how can I fix this?
NB: the widget is on the internal memory
Is your widget application installed to the SD card? If yes, then that is the problem. When the phone reboots, it takes a few minutes for the SD card to get loaded. This causes an issue for any widgets that are not installed to the internal memory as they aren't available when the phone first boots up, causing them to not load.
So, please verify the widget app is installed to internal memory instead of the SD card.
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