Mini USB Connector

I wanted to connect 2 phones together by via usb, so that I can exchange data on the 2 mass storage cards (on the go, without swapping cards and without the computer). But they both have only a mini usb type B connector.
I can’t find cables for the job!! So does that mean it can’t be done because there needs to be a type A connector???

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I wanted to connect 2 phones together by via usb, so that I can exchange data on the 2 mass storage cards (on the go, without swapping cards and without the computer). But they both have only a mini usb type B connector.
I can’t find cables for the job!! So does that mean it can’t be done because there needs to be a type A connector???

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