"competition" - that's the solution then.
Once RIM have managed to destroy themselves in the corporate world you are left with the choice of buy Microsoft
MSFT's only hope in mobile, and their only reason for going there is to be the standard business solution - the only one that works with MS-exchange, MS-domain-emperor(or whatever it's called today) and MS-office cloud.
Once you ensure that corporates/government only allow MS mobile devices onto their networks you have a pretty nice market sewn up. And one that doesn't care about price and buys new kit regularly
The only tricky bit is persuading all those corporate and government customers that they haven't had a perfectly workable blackberry solution for years, and that they shouldn't save money by allowing workers to use their own iPhones.