I can't sign in my Apple ID even with the correct password.

illona64 Said:

"I can't sign in my Apple ID even with the correct password.: I tried signing into my apple ID on my iPhone but when it asks for my phone passcode, it also asks for my old one.[...]"

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Re-Associate from your Apple ID: Perform the following on, in the order provided.

I. Sign out of Apple ID on the iPhone:

1. Go To: Settings
2. Tap: your Apple ID (Your Name at Top)
3. Scroll Down: to the very bottom
4. Tap: Sign Out and Confirm

II. Disassociate from your Apple ID, on your Computer:

1. Go to: Sign into appleid.apple.com
2. Click: on the device
3. Click: Remove from Account

III. Sign in to Apple ID on your iPhone:

1. Go To: Settings
2. Tap: your Apple ID (Your Name at Top)
3. Sign In: to your Apple ID

See If you can't connect to the App Store, iTunes Store, or other Apple services https://support.apple.com/en-us/HT201400. There have been quite a few Apple server connection problems lately. Among other things, in the above document, see Check Apple’s System Status page. You can check there to see if the needed server is available when you need to use one. 

And, given the recent connection problems, I suggest you use my search link in trying to solve your problem unable to connect to apple server. You will see a number of links that are, or may be, related to your problem. But, I have not seen a definitive solution for it. 

If you want to contact Apple Support to deal with your problem, see:

Get a call from Apple support to help solve your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362

Apple ID Support https://support.apple.com/apple-id

Apple Support Twitte rhttps://twitter.com/AppleSupport

Apple ID account security for country-specific and region-specific help https://support.apple.com/en-us/HT204169

Get Support: We’re here to help https://getsupport.apple.com/. Go through the options to find the best one.

Some other things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone, iPad, or iPod touch         

Try a forced restart.

Reset Device.      

If necessary

Hard reset.        

Do a backup and try a factory reset. Then restore from your backup.

Restore to Factory setting.      

Backup - Restore your device from an iCloud or iTunes backup.