If I were you, I will get a free phone from the mobile phone company by signing a 18 months contract, of course, the free phone is not as fancy as the ones will cost you money. Then spend the cash to buy the lens and at the same time, save money to a new fancy phone.
Cheer up, make good use of your existing lenses and take great pictures with them. Maybe you will find using one lens is better than other and treat this as a time to train using one lens.