Can I send songs on my mobile phone (via SMS)?

Yes, I don't know if your mobile phone is a smart phone in other ways. If it is not a smart machine, I will tell you sincerely that the hope is slim, because the functions of non-smart machines are limited and the hardware may not be powerful, so SMS sending is definitely not possible, and other methods are almost impossible. But if you are a smart phone, everything is much easier. Send a song? Then you can send your songs as email, or send them in jpg format, and send messages as usual, just using SMS tools such as qq address book.