A lot of people are complaining online that they connot use various apps since they are unsigned. I have an option on my nokia 5230 to install both signed or unsigned apps. If I use the install both apps option will the apps install anyway, because i can't download them signed from ovi store since I dont have wi-fi in Nokia 5230. By the way , is the IMEI number a secret number or just a number that doesn't matter?