I got Rubix duel as LTF. I was not getting any upgrades on iOS, changed the sim to android and VOLA got the LTF offer and took it. Same happned with Coral LTF Rupay.
You can apply from a new number, you can read my experience from below thread:
https://www.technofino.in/community/threads/my-experience-of-closing-idfc-select-card-and-applying-for-wealth-card-a-big-fail.22171/post-503734