Phantom power is for powering microphones that need power... eg: condenser mics.
Most are +48VDC and there are some that operate at lower voltages, but the industry standard is +48VDC.
To connect a phone you will need to use the headphone output of the phone and connect each channel (left and right) to a line level input on the mixer.
The 'Tape' inputs should be OK.
If they have a gain control, you'll need to adjust it and the headphone level on the phone so it doesn't overload/distort the sound.
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