Iphone and my wifi network

[ITTY82]

Hi I'm really hopping to get some help. My younger brother got ahold of my phone last night and installed something's from the internet to my phone. And in doing
so had set by date on my phone back two years and then tried to cover it up by renew lease on my wifi and reset I'm setting

 

[kataran]

Welcome to iMore

If this is the case I suggest you perform a full restore of your device because not knowing what he did its close to impossible to reverse

 

[Just_Me_D]

Hi I'm really hopping to get some help. My younger brother got ahold of my phone last night and installed something's from the internet to my phone. And in doing
so had set by date on my phone back two years and then tried to cover it up by renew lease on my wifi and reset I'm setting

I agree with Kataran. Restore your device by either going to Settings - General - Reset and then selecting "Erase All Contents and Settings" or by connecting the device to your computer and then selecting "restore" via iTunes. Yes, you will lose EVERYTHING on the device (hopefully, you've got a backup of your important data, pics, etc.), however, you will have a device that will perform as it should without worrying about whether something malicious is on it or not.