If the phone is in your ex-partner's name, they have the legal ownership and control over the account, including the ability to turn off the phone or make changes to it. In this situation, it may not be possible for you to trade it in or get a different phone account under your own name without your ex-partner's cooperation.
However, there are a few things you could consider:
Talk to Your Ex-Partner: Try having an open and honest conversation with your ex-partner about the phone situation. Explain your needs and see if they would be willing to help you transfer ownership or cancel the account so you can get a new one in your name.
Check the Contract: Review the contract or agreement related to the phone account. It may contain information about the process of transferring ownership or canceling the account. Some providers allow transferring the account to another person's name or creating a new account under your name, but it depends on the specific terms of the contract.
Contact the Phone Provider: Reach out to the phone provider directly and explain the situation. They might be able to provide guidance on how to proceed or what options are available to you.
Obtain Legal Advice: If you encounter difficulties in resolving the situation, it might be wise to seek legal advice. A lawyer can review the situation, look at any agreements involved, and provide advice on how to move forward.
Keep in mind that the laws and regulations surrounding phone contracts and ownership may vary depending on your location, so it's essential to consider the specific legal context in your area. It's always best to resolve such matters amicably when possible, but if conflicts arise, seeking legal advice can help protect your rights and interests.