I was away from a wifi signal for a few days, took my 7 with me for reading from the book reader app. In notifications, I noticed it telling me some apps had updates, which baffles me as not being connected, I have no idea how it knew. Obviously something going on I don't know about. Anyway, by the time I got home, there was around 20 of them. I started the updates, or tried to. Each one seemed to download the update, showed it as in the process of installing it, but then gave me a Package Invalid notice. They're still sitting there in the queue waiting, but several tries just give the same result. Out of curiosity, I tried to install a new app. Same result, Package Invalid. Can anyone enlighten me as to possible causes? In case it bears any relevance, while I was away, I ended up not even using it much to read, as I kept getting a Not Connected To Network message popping up, sometimes at a couple of minute intervals, sometimes as often as every ten seconds. I got this with the wifi switch on and off.