I lost the charger that came with this, but my phone charger fits. Is it ok if I plug it in with my phone's cable?

Hey Robsander, Your device is out of memory, so you need to clear up some space. First, go to your settings menu, then select "Storage". From here you can see how much space is available on your device, and what's taking up the most space. You're probably going to need to go through your apps and delete extra apps you don't use. You can do this by selecting "apps" from the storage menu, then by selecting an individual app from there. Be aware, many apps that came with the device can't be uninstalled, as they're needed for the android system. If you need help with anything else, check out the troubleshooting page.

Try restarting your device. If that doesn't work, it could be a hardware problem and you'll need to take the tablet apart and inspect the buttons. Make sure that the buttons are making contact with the plastic button cover, as they could be misaligned. If you need more help, the troubleshooting page is a great resource.