Try "Reset Network Settings" and if it still doesn't work, "Reset All Settings". Please do not mistaken it with "Erase All Settings".

Both don't work. Searched on google, this problem occurs for the past 2 weeks as I could see on google ..

No Wi-Fi = Phone Completely useless for my current situation ..

Please help me

Try restoring the phone?

How about a clean install of iOS and then restore from iTunes?

That's my last resort. I found a solution which is to put into a refrigerator for 10 minutes... Let's see if that works .. If it doesn't then I have to do that already

Are u sure thats the solution? It may damage your phone u know. Better try restoring, if its not software problem then it maybe a hardware problem and may need to refer to specialist. Try pm wimpykid

Putting it into fridge? I doubt Apple manufacture devices that could sustain inside a fridge.

Hairdryer until really hot then put into fridge. It really works!! I tried the 3rd time only it works ..

Confirm will work, all electronic products marketed in the US and EU has to go through testing of -10 degrees celcius for extended periods of time. I hated that part of testing when I had to go into the bloody area to test out the products to see if the temperature affected the quality.

Sorry, never knew bout this. You have a job that requires you to work at extremely cold temperature?

Used to, only for a short period of times. When you work in our of our local factories which assembles electronic goods for overseas consumption, you will see the rigorous process these electronic items go through first before sent out.

Was looking into my privacy section and then noticed I allowed Safari to my contacts... question is what does Safari do with the contacts? It doesn't appear on some of my friend's iPhones.

Thats blatant invasion of privacy if you ask me.

I haven't update my iOS to 8.1.2 coz I don't think it does anything. I may be wrong. Comments?

Depends on what iPhone you're using. The only official change listed by Apple is the issue with your purchased ringtones disappearing on 8.1.1. Other changes are device specific. See here;
http://www.gottabemobile.com/2014/12/15/ios-8-1-2-review/

Just updated to 8.1.2 couldn't stand with the constant Wifi problems before on 8.0.1. Although some website says it doesn't fix the problem but it's going well for me so far. Also, is it just me or is scrolling a little slower/controlled/less sensitive (safari) now?

This post has been edited by SheepMekk: Jan 23 2015, 12:01 AM

i think currently the latest ios version was 8.1.2

1month+ and still dont have any update yet

mine still 8.1 since downgrade from 8.1.2 after upgraded coz of battery drain like hell

some more, long time didnt made any backup since my macbook unable to on. donno whether the mag safe or the charging port problem.

Guys, iOS 8.1.3 released for download now....I'll download tonight.

Bloody slow to download

Clean restore by iTunes. Took 10 mins only.
6 plus no lagging ady.
Monitoring the batt now