i want active my apple id

If you have bought that other iPhone 2nd hand, you must contact the seller (hopefully it is the previous owner), otherwise you have been scammed.

Each Apple device is linked/associated with an Apple ID of the person who did the setup.

Activation Lock prevents anyone who is not the owner from using this iPhone.

To unlock the Phone, you need the Apple ID and password of the previous owner, that were used during set up.

So you have to contact the previous owner.

The previous owner has to read -> this Apple article: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch -> What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support

Then the previous owner has to remove the iPhone from his account, see this Apple article:

Check your Apple ID device list to see where you're signed in

Check your Apple ID device list to find where you're signed in - Apple Support

Then you can sign in with your own Apple ID.

See the following Apple articles:

Activation Lock for iPhone, iPad, and iPod touch

Activation Lock for iPhone, iPad, and iPod touch - Apple Support

How to remove Activation Lock -> How to remove Activation Lock – Apple Support (UK)

• If you need help removing Activation Lock and have proof of purchase documentation, you can start an Activation Lock support request.

Read this before you buy a 2nd hand iPhone.

You can also contact Apple support for help, -> Get Support (apple.com)

You have to show proof of ownership of your product, provide all documentation showing your purchase of the device.

If you do not have additional proof of ownership, contact the reseller. They may be able to provide the original purchase document.

Once Apple receive your proof of ownership, Apple will further review your request and provide an update.

See also -> Keep your receipt after you buy an Apple device

Keep your receipt after you buy an Apple device – Apple Support (UK)

Ask your money back if possible, perhaps you have bought a stolen iPhone.

From a post by Apple Community Specialist Brittany1416 in thread Inactive Apple ID - Apple Community :

"We'd like to get you some help with this issue. For this issue [an inactive Apple ID], please contact Apple Support for assistance. You may be able to reach Apple Support here: Contact - Official Apple Support "

Telephone numbers --> Contact Apple for support and service - Apple Support

Note that having an "inactive" account is not the same as having a disabled account. If your account is disabled, see this article --> If your Apple ID is locked or disabled - Apple Support

You are sign in here .  .  .  with your Apple ID & Password.

With your 'new' Apple ID?

If so, your 'new' Apple ID is active.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

See -> Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support

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Please check also ⤵️

1.

If you see a message that says "Your account has been disabled in the App Store and iTunes", there is a problem with your payment method on your account, to resolve the problem you need help from Apple support,  click -> contact Apple Support for help.

2.

If your Apple ID is locked or disabled -> If your Apple ID is locked or disabled - Apple Support (CA)

-> Get a verification code and sign in with two-factor authentication

Get a verification code and sign in with two-factor authentication - Apple Support

If you have followed all the steps and instructions and if you still need help, get more help and assistant from Apple directly, see Contact Apple for support and service -> Contact Apple for support and service – Apple Support (UK) 

What have you done with your other Apple ID?

If you've ever requested to deactivate your Apple ID, see -> How to deactivate your Apple ID account

How to deactivate your Apple ID account – Apple Support (UK)

scroll to ⤵️

How to temporarily deactivate your Apple ID

Sign in with your Apple ID at privacy.apple.com on a Mac, PC, iPhone or iPad, and select "Request to deactivate your account". If you can’t see this option, it means that this feature is not available in your country or region. 

When you request to deactivate your account, you receive a unique alphanumeric access code. Make sure that you keep this access code in a safe place – you must have it to reactivate your account. 

After we verify that you are the account holder making the request, we deactivate your account.

Can I reactivate my account?

Yes. If you request account deactivation, you'll receive a unique alphanumeric access code. When you're ready to reactivate your Apple ID, contact Apple Support, provide your access code and we’ll help you reactivate your account. If you lose this code, we won't be able to help reactivate your account. 

For more support and assistance see -> Contact Apple for help with Apple ID account security

Contact Apple for help with Apple ID account security - Apple Support

or -> Click here for more support and assistance.

See -> If you forgot your Apple ID password -> If you forgot your Apple ID password - Apple Support

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

i dont remember the password of my other apple id and it says apple id not active. i can't do anything on the phone because the apple id is not active.

To unlock your iPhone, follow the steps described in the Apple article:

(< iOS 15.2) ->: If you forgot your iPhone passcode

If you forgot your iPhone passcode - Apple Support

(iOS 15.2 and newer) -> If you see an iPhone or iPad unavailable message or Security Lockout screen

If you see an iPhone or iPad unavailable message or Security Lockout screen - Apple Support

Have you read what posted?

Is that really your Apple ID?

Is that really your iPhone?

Visit an Apple Store or an Apple Authorized Reseller in your region for assistance to diagnose the problem.

And they could offer a possible solution.

You will first have to make an appointment due to the pandemic.

See: Contact Apple for support and service

Contact Apple for support and service - Apple Support

For more support and assistance see -> Contact Apple for help with Apple ID account security

Contact Apple for help with Apple ID account security - Apple Support

or -> Click here for more support and assistance.

If you can't call, borrow a phone from someone near you.