Okay "call me" refers to calling someone by phone and "call to me" refers to shout or speak somebody's name in order to attract their attention. But I think we use "call" in a different situation also like:-
Please check.
1. "Tom, your friend, is standing at the gate and calling you [strike]go[/strike] to him". is it correct?
2. "I am going inside. If you see someone, call to me ASAP".