Bypassing Microsoft Exchange Block on iPhone OS

Hello. I have an iPhone 3G what i have happily been using jail broken for months with my works mail being synced to it via microsoft exchange, However they decided to block the iPhone from receiving and sending Mail, Contacts and Calendars as it is thought to be a security threat and is not secure enough. So i had to sell my best ever phone. Not happy! after about 3 months with an onmia i have decided to use my sons phone to try and change the user agent of the whole device to something what doesn't envolve anything relating to iPhone (after reading up on the case i found that they block the device ID ect You Had Me At EHLO... : iPhone 2.0; Welcome to Exchange!) but im finding it hard to know what files to change. I know theres a toggle to change the UA of the MobileSafari app floating around on the modmyi repo in cydia but that dont change nothing to do with the mobileMail app, If anyone knows anything of can help me it would be great!

Thanks

Liam

 

On cydia store.. the latest UserAgent Faker (can't remember the actual name) allows you to set what apps use what user agent from settings... maybe try that.. the bosses at my dads work all got iPhones so there allowed on the exchange again (lol)