That's sad to hear, and I would love to know the details (Which OS are you running? What did you attempt to upgrade?). Regarding your conclusion, I totally agr

That's sad to hear, and I would love to know the details (Which OS are you running? What did you attempt to upgrade?). Regarding your conclusion, I totally agree: Don't have only one device, make sure to have a backup. IMHO this also applies to regular (Android, iOS) smartphones, too - device failure of mobile devices is just one fatal motion, one time of not paying enough attention away.