Do I have to install a vaccine program on my phone?

pu1. If you use an iPhone, you don't have to download it. I wonder if there's a vaccine program for the iPhone before that

2017-12-22

OK

pu2. If it's an iPhone, you don't have to install it. If it's an Android, it's not necessary, but if you want, you can There's a v3 vaccine

2017-12-22

OK

pu3. If you put a vaccine on your phone, it's not recommended because it slows down the speed of your phone

2017-12-22

OK