My Nexus 7 (2013) keeps losing its wifi. I either says that the local wifi is saved bur won't connect, or else says that there is no wifi, when everything else (phones iPads etc) can see the wifi. The only solution I have found is to power on and off, and then it finds it OK. It's now happening more and more frequently. Other than that it's a super tablet, and I am not wanting to change it. Does anyone have any suggestions?