My iphone 5c is accepting my password pin and goes to the language screen but instantly goes back to password screen. Why is this?

connect to itunes is the best solution on that, but be sure that you know the password of your apple ID, i hope this helps you. thanks!

you can restore your iphone 5c via itunes this will remove any passcode from your iphone but it also delete all data on your iphone 5c. you can also start in recovery mode

for iphone 5c to enter in recovery mode press and hold home and top button or home and side button until you will see recovery mode screen.

you can also recover passcode from system folder but for that you need to have special software which can access your root folder.
Ipad iphone restore without losing data

Hi Daniel
Passwords are everywhere these days...
To protect users from unauthorised use of their iPhone.
Wouldn't be much use if people could easily crack the pin.
Therefore....
You must remember your own PIN numbers & Passwords
Also your Apple ID username (email address) & Password
So..
Resetting / Rebooting your iPhone may take you back to a "Restore" or take you back to your Apple ID via iTunes on your computer with the USB cable plugged in.
You Have done a Backup... Haven't you?
To Reset:
Hold Top button & Bottom round button down for
about 10 sec - till logo shows-to reBoot.
or
About 30+ seconds - to get to "Recovery Mode"
where you will need to plug into a computer running iTunes
then follow the prompts & Supply your Apple ID etc
Good Luck
In future
It's smart to Invest in a password manager to keep all this info safe
1Password for iOS
SplashID Password Manager

Press power ( home) button and swipe right ,unless you have a password. If you have a password, you will need to enter password after swiping right.

Some troubles appears along with Apple releasing iPhone 6 and iPhone 6 plus.
I can't play HD AVCHD movies on iPhone 6/6 Plus. This is kinda embarrassing.
But soon, I get a solution - Aunsoft Video Converter.
http://www.aunsoft.com/video-converter-mac/

Not sure. But dod you check if the charger and the cable are correct? When you insert the charger cable the phone should give a beep, turn on for a few moments and than goes in sleeping mode. If nothing happens, please try another cable and / or an different charger.

I'm assuming you have tried the obvious things like turning the volume up? If so, you need to replace the ear piece speaker. Link below to buy the part and video on how to fix. Fairly easy repair.
Earpiece Ear Piece Sound Speaker Replacement Parts for Apple iPhone 5C

When you locked your sim, look for the paper that cam with your sim. On there was the original pin and there is the PUk code. With he PUK you can give in a new PIN.
If you don't know the pass code on the unlock screen, the phone will ask you the password of the Apple id (partial seen on the screen) you did setup the iPhone with. The same id you use to buy stuff on the iStore (and in iTunes)

You still can unlock the phone, if you use the password from your apple id. Don't mess up, because you did setup the security to this level and only you can unlock it. Don't get frustrated. Just do what is asked.
If you really don't know the pass code and the password for your apple ID, the only thins you can try is to bring it in an Apple store and after you proved (with an invoice) the phone is yours, they could help.
Remember, Apple tries to protect your phone from being stolen, by improving the security level. You don't need to use the lock screen in the first place, but then you can't complain when loosing the phone it is used by someone else.

I assume that your iphone is not locked to any cell phone company ...

Insert your SIM in your old phone/another phone and remove the SIM pin lock/password, then try this unprotected SIM again in your iphone. Once it is accepted in the iphone, put the SIM lock/password back using the iphone.
Hope it helps.