which altcoins you mean the one I can mine with my phone
I don't know any coin that you can mine using your phone profitably but MASS is defiantly a good option if you want to start mining on your laptop. Its easy to setup and has also price value of around 0.30$.
Right now its on 0.70$ and still going up. It is one of very few coins that has seen such a positive start. I am predicting it will cross 1$ barrier in this bull run. If you have bought it at 0.20$ week back, you must have a party going on right now.
buying mass in exchange is the right decision because to get mass on mining is very difficult and requires very large storage. may take up to 10TB for solo mining.