Can't remember your iPhone passcode? Wanted to know how to unlock your iPhone Passcode? then you are in the right place. There are many ways you can unlock your iPhone but there are mainly three ways which I will discuss here and which can unlock your iPhone passcode, this technique not only works in iPhone6 but also can be used in other iPhone versions, We will discuss all of them one by one.

So let's get started,
Using Third-Party Softwares And Sites
Using this method you will just need your IMEI and iPhone version, and which uses third parties software to unlock your iPhone passcode, But For unlocking your iPhone 6 using third party software you first need to find your unique IMEI number, which will be used to unlock your device using third-party services,
Don't Know your IMEI number? Not to worry.
There are various ways you can find it, I will discuss it below all the ways.

1. You can find it by dialing *#06#
2. You can find your IMEI number on the backside of the device
3. If your device is not-activated, You can click on the 'i' button on the activation screen after clicking it you can view your device IMEI number by clicking on it.
Now you must also know your model of the device, Such as whether it is iPhone 4, 5, 5c, 5s, and 6, 6s, and 7, etc..
Don't know your iPhone model? It is a small text which you can find at the back of the iPhone,
Now you know your IMEI number and iPhone version, here we go now just select the best third-party service provider.
I will recommend you to use,
After researching and reviewing a lot I have found this site one of the best among all the others. It will unlock your iPhone within 2 days of any models, and the prices just start from 25$ to 35$ depending on your location and carrier prices.
For unlocking your iPhone you just need to,
1. Go to the site and click on "unlock iPhone" You will be redirected to the new page where you will select your iPhone model.

2. Select and click the iPhone model you wanted to unlock.

3. Now select Your "Country"
4. Select your "Network"
5. Enter your IMEI number, and check the price If you are happy with it.

5. Just click on "unlock now"
6. Now you will be redirected to the checkout area, here you will be asked for the payment via secure checkout.
7. Now just click on "Buy Now" by using your preferred payment system.

8. Here you go, You will get your iPhone unlocked within 2 to 3 days

Using the iPhone Restore Method
And third and the best way is using the iPhone restore method, It is the best way and cost nothing.
but the only demerit is using this method you will lose all your data until and unless you don't have recoveries such as in your computer, iCloud or iTunes.
I will discuss it all by step by step, So let's begin.
1. You need to plug in and connect your iPhone to your computer using a USB cable, once connected and the computer has detected your computer.

And switch off the phone.

2. Now will be in the recovery mode, so to enter in the recovery mode you just need to hold your "Home" and "Power" button at the same time, Keep in press it up to 10 seconds, once you have pressed it up to 10 seconds you just need to move your hand away from power button, and just need to press home button until you don't see a message (in computer/ Itune) regarding, "Your phone has been detected as a recovery mode".

3. Once your phone has been detected you will see a message like "iPhone recovery mode" Click on restore/reset button on the screen.

4. Now again Just click on "Restore and Update"

5. Click on "Next"

6. Click on "Agree"

Once you click on Agree and here we go, you will see a message
"iTunes is restoring the software on the phone",

Now this will delete all your data from your phone.
And it will install software which It will take around 15 to 30 minutes depending on your internet speed needed to download the software. Once it completed the download, It will process the file and, it will show the message with "Done".
7. Now you just need to click "Restore iPhone".
8. Now again click on "Restore and update", Once you have clicked you will see "Extracting Software" at the loader of the header
9. Once done You will see an iPhone/Apple logo on your phone instead of USB pointing cable, and you will also see the processing bar under it. this process may take up to 5-10 minutes.
10. Once everything is done it will show the message "Your iPhone is restored to factory setting and it is restarting" and here we go. finally, now you can unplug the device with your computer, and start working on it.
[NOTE] keep in mind in the whole process your phone must be needed to be plugged into the computer.
Once all done you will again able to use your phone.

Using Hardware
Unlocking iPhone6 using hardware is very risky as comparison to other two ways as the repairer will take out your iPhone parts by parts using there greasy hands, which may damage your iPhone in many ways, all the above the cost can reach up to not less than 200$ and also there is no guarantee whether it will work or not.
However, you can use this.