No, you don't need antivirus for your smartphones unless you download to choose an app from unknown source. A lot of Android viruses are installed on the back of suspicious apps, the apps you will no longer find in the Google Play store. By default Android does not allow you to install apps from unknown sources so there's no chance of you accidentally installing something that harms your phone.
For iPhone users, the tech giant Apple designed the iOS platform with security at its core. iPhones and iPads are completely safe devices unless they are been jailbroken. Once they are jailbroken, the iOS platform couldn't limit the access of apps to the system.
So, If you are only a regular Play Store and App store user, anti-viruses are actually not recommended for you because it would just slow down your device.
Therefore, it would be right to say that Android phones can get infected with viruses or malware. In order to protect your Android phone against malicious threats, it is recommended to download and use antivirus or internet security apps that offer complete protection against ransomware, Trojans, Spyware and more.
Check out these useful tips to help prevent malware and viruses infect your Android phone
If you use internet bank or enter credit cards on your phone antivirus is needed 100%.I have not seen yet authoritative rating of Androind antivirus software so in my phone I'm using 3 famouse antivirus programms at one time.
I never heard that me or my any friend is installing any kind of antivirus to their phone .
Off-course you are not going to install any kind of application from unknown source.
And if you think that your activities on phone can invite any kind of antivirus so its much better to switch for iPhone rather to install any antivirus.
Its my personal opinion cause i am also an iPhone user and i never think about all that stuff, live fearless.
Hey, Mobile's phone needs antivirus but the ones which are available on the play store for free, In my experience they make your mobile more hanged up.
Antivirus which comes pre-installed in your mobile or paid antivirus is best.
So if you really want to use antivirus, go for the paid ones.