BYOT and BYOD assumes that the devices / tablets in question can meet acceptable security measures and can NOT be used as a conduit to infiltrate the corporate security.

They also assume that the people want to do so.

They assume that the company is happy with having company info on systems the company has no control over, or the owner is happy to let the company play about with his device / tablet.

They assume the device will be useful getting corporate stuff over the Internet and the owner is happy to pay for that - - most of the world pays for download by the MB, unlike the free or low cost unlimited download plans in the USA. (edit to add - or low cost unlimited)

And not a word of how the company intends to deal with an employee who refuses to BYOD / BYOT at all, but demands the company provide one at company expense if they want him to use it.

I know of one company that refused to buy IT admins cell phones or pay for cell phone services, they also refused to pay on call payments to make staff stay available on a phone during the weekend. until the failure to contact an admin one weekend cost them $250,000 in penalty fees due to the inability to meet contract terms due to a simple hardware problem any of the admins could fix if they could have been reached, but were all away from home for the long weekend. Pinch pennies and waste pounds, typical accountant type behaviour as they can see the pennies each week in the bills but not the pounds hidden in the contracts. The cost of the penalty got taken from the accounting branch budget as the finance officer was the one who refused the IT manager the approval to buy the admins cell phones at company expense or pay stand by fees. He didn't like that, but the GM agreed it was his decision that incurred the expense.