Do any of Apple's devices support iOS 4.0 but not multitasking?

Do any of Apple's devices support iOS 4.0 but not multitasking?

If not, I don't understand the [UIDevice isMultitaskingSupported] API (which was only introduced in iOS 4.0).

Thanks

Yes.

• Iphone 3G
• Ipod Touch 2

Due to hardware limitations, they can run iOS4 but not actually make use of things like multitasking. On my old iPod touch, running iOS4 added a significant delay to the device's operation, even without multitasking.

iPhone 3G doesn't support multitasking

iPod touch 2g and iPhone 3g don't support native mustitasking. Multitasking can be disactivated on jailbroken devices, this is aswell recognizable using isMultitaskingSupported.