I don't have PC or laptop so what skills or programming language can I learn through my phone

 I don't have a PC or laptop so what skills or programming language can I learn through my phone

If you do not have a laptop or PC, then you can start with programming.
First you make notes.

For example, if you learn programming language, then make notes of each topic.

And keep on making its program copy. Which you will get to clear the complete concept of programming.
This will be the best if you have no laptop or pc .