Or what our company does - merely provides a subsidy to buy a device. Just like covering running costs. (Employee chooses, buys and owns the device. The subsidy is enough to buy an android - if want an iPhone or other high-end phone, you just pay the extra money.)
The question I have is what the smartphone is used for. If it's to receive and make phone calls the employee could simply give a SIM and a basic phone. I've seen 20 euro GSM and 50 euro UMTS phones, with a lot o extra features like camera, fm radio, mp3 player, web browsing and so on.
Even a low end Android phne costs under 100 euro, and makes possible to VPN or ssh easily in a remote system, and anyway some 'dumb' phones are capable of this.
On the other hand if specific smart features of a phone have to be used for work-related operations, having to support a generice device is a IT support nightmare.
If you make anthrax illegal, only criminals will have anthrax!
Why make illegal trash speed metal bands CD and tapes? Especially when not banndin One Direction...
I have hardly ever known a mathematician who was capable of reasoning. -- Plato