What is best way to display a partial mobile number

Refer following links:

https://www.karansaini.com/fuzzing-obfuscated-phone-numbers/

https://www.alldigitaltricks.com/wp-content/uploads/2017/12/kotak-bank-change-mobile-netbanking.png

https://www.trickolla.com/2016/12/Register-Mobile-Number-With-Bank-of-Baroda.html

Use case at hand is to show partial mobile number to user: Like 'Continue with mobile number ending with * * * * * * 1 2 3 4'

Problem is we might have last 4 digit colide due to users have choice to select last 4 digit of mobile and we are showing multiple such options so to uniquely identify option we need some other mechanism.

Options I am thinking are:

Option 1 - display 1,2 and last two digits ' 1 2 * * * * * * 3 4'

Option 2 - display 5th, 6th, last two digits ' * * * * 1 2 * * 3 4'

Option 3 - display alternate digits ' 1 * 2 * 3 * 4 * 5 *'

Option 4 - display last 4 digits ' * * * * * * 1 2 3 4'

Problem in option 4 for our country/target market there is high collision for a given user as he can choose last 4 digits.

---------EDIT-------------

In my use case, in UI plan to display multiple options to customer to use one of previously done registration.

Something like this: 1. Use your account with mobile number 5647 234 4567. 2. Use your account with mobile number 7868 456 7891. 3. Use your account with mobile number 4321 321 1989.

But instead of showing full mobile number on screen we want to show tail or partial number. The question here is to what partial the best option to display it to user, so if we go by option 1 i.e. display first and last two and mask others. It will look like this.