Smart phones & Apps

Hi mates as you already know smartphones becomes essential part of our daily lives, and apps are one of the main reasons for their popularity. I am facing some issue with Remini app, few days ago I install mod version of this app. After installation of this app some kind of malware also installed in my smart phone, after that I un-install this app but the malware is still in my phone. I have some major concern about my smartphone security, how to get off from this situation i don’t know but i am confused.

Can someone please tell me what steps can I take to protect my smartphones and personal data from security threats?