No
No
You'll have to come from far, I'm afraid.. the total energy of Earth's magnetic field is surprisingly low, that is about 950 KW, which can put a 30 x 10e-3 Tesla magnetic field strength to move our compass needles.
Provide all power for the planet
Currently, the world's population consumes 15 terawatts of power. Say you'd like to distribute world's energy consumption, assuming field strength is proportional to energy, the magnetic field strength needed for distribution would become (15x10e12/950000)*30x10e-3 is
4.73 x 10e5 Tesla.
This is a huge field. Animals would probably get cooked in milliseconds. A neutron star might invoke it, not a planet.
Mobile phones only
The above outcome would provide 1850W per inhabitant. Say you'd need only 18.5W for mobile phones, you still get
4730 Tesla.
To compare, an amount of only 16 Tesla will levitate a frog,
.. is that dangerous ? yes,
The human body starts to suffer from current induction when the exterior magnetic field reaches around 7 to 8 Tesla. Symptoms include increase in body temperature, diminishing brain functions and even hallucinations