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Ok, the 'arrow' keys: look on the back of the camera for the large circular button with FUNC SET in the middle. The round button can be pressed up, down left and right. Those are the 'arrow' buttons.
The card out of your cell phone may be formatted or have a file system different to your Canon. The camera is not a universal photo viewer. You can view files takes with the camera. You may have trouble viewing others.Let me know if you need further help.