A:AnswerA zillion. Possible slight delay in delivery.
But seriously, if you want enough for a school, or a school district, or a city, you should contact the Best Buy corporate sales section, or Samsung directly.
A:AnswerAll new Samsung devices are using slow charge rate 1.0 amp. Any higher amp charge will not work. It's help to keep the battery from damage and last longer. Probably your cable or charging connector wearing out or damage.
A:AnswerYes, and Yes. Any device that can connect to WiFi will connect to any unlocked WiFi signal, regardless of its source, or any locked source if you have the password.
A:AnswerIt’s a present for someone so I can’t say. However, based on my iPad experience, the apps are available to download. Sorry I couldn’t help more.