So compete by doing something innovative on the phone hardware. Who was the first to have a self-portrait mirror on the back of the phone? (Palm I think.) Who had the first forward-facing camera on a phone? (Not sure.) Things like that sell a lot of phones to Joe and Jill Sixpack. Put a dedicated flashlight LED and button on the phone. Make it waterproof and/or drop-proof.
But the number one way to sell more Nokia Windows Phones? Get on the other U.S. networks besides AT&T. AT&T is still the king for iPhone but Sprint and Verizon combined sell about as many iPhones as AT&T does, so Windows Phone is missing half the market by only really being on AT&T. (Yes, there are other Windows Phones, but no serious handsets outside of AT&T.)
But the number one way to sell more Nokia Windows Phones? Get on the other U.S. networks besides AT&T. AT&T is still the king for iPhone but Sprint and Verizon combined sell about as many iPhones as AT&T does, so Windows Phone is missing half the market by only really being on AT&T. (Yes, there are other Windows Phones, but no serious handsets outside of AT&T.)