There hasn't been any Android wallet developed yet, but I would like to have a grasp at one and be able to store my XPM anywhere. If XPM could just get the attention it deserves, we could see many innovations that would lead the path towards long term survival of the cryptocurrency.
Nevertheless, if the XPM wallet for Android gets developed, then I'm sure that it would help increase its awareness and attract more users into the cryptocurrency. I'm looking forward for something big to happen in Primecoin, thus I have been investing into it ever since hoping that one day it could rise once more and stand out against other cryptocurrencies.