Gmate is a small tool that fits in your pocket. Insert any sim card into Gmate and have voice calls (real dualsim), sms and Internet access available on most Apple IOS and Android devices via Bluetooth
You can make your iPhone dualsim and turn it into a real 2 sim online phone
You can turn Android phones into real dualsim, real 2 sim online phones.
Non 3G capable iPads or Android Tabs can get Internet access and phone function via Gmate.
Gmate turns an iPod Touch into a phone.