IPhone Gevey Ultra unlock voicemail?

I have an iPhone 4 GSM running on iOS 5.1.1 with baseband 4.10.01, I recently bought a new gevey ultra sim to unlock my phone but a voicemail notification hinders my process impossible, everytime I'm in the middle oof searching for signal since I already unlocked using the directions given by gevey.com with the furiousmod cydia app, a notification for voicemail shows up and makes all my apps unopenable and gives me a no service message at the top left of my screen, I have recently bought a new simple mobile micro sim card to fit it in the gevey sim tray accordingly and since the voicemail message has been making this unlock impossible, if anyone at all could help me please do I'm out of ideas and I just don't know what to do, and I really need my phone back; the sim card is already activated and I don't know what to do; thanks a lot if anyone at all can help me

A gevey sim is a hardware 'hack' which tricks the iPhone into making a call via a different route. You will never be able to update your handset if you use a Gevey Sim. Because they sit 'behind' your own sim, they are also prone to getting stuck into the iPhone forcing a trip to an Apple Store to take the phone apart and get it removed, which they now refuse to do and claim they void the warranty.It's totally unsupported by Apple. You can go to http://attiphoneunlocker.com/ Our method turns your iPhone into a factory unlocked unit, meaning you can always update to the latest version of iOS. Your iPhone is an expensive device, and you want to keep up with iOS updates as Apple brings out new features etc.
http://attiphoneunlocker.com Here is a coupon Code C4FC4669 They use Apple's IMEI database.
Or you can use http://unlockiphone-4s.net/ it is a software.