as at last update on the news, TM is cockblocking nationwide Fixed-line Number Portability (akin to Mobile Number Portability).

All other fixed-lune telcos are ready and eager, but not TM.

TM gave all kinds of reason, but the bigger takeaway is, TM is the largest infra of fixed-line, and it realises it will be the biggest loser if customers can take its number pool to other providers who never had the distinction of shouldering responsibility of nationwide Jabatan Telekom Malaysia.

i don't understand what you mean by "switch back to normal and pay rental", nor i have industry's insiders knowledge, so can't answer your query.

my general public knowledge right now - the fixed-line number pool is still anchored to area-based. that's why they can't move your existing POTS service number into fiber-based service; you have to pick anew from fiber-based pool.

in theory, with FNP(?) you can even move a fixed line +603 all the way to Sabah interior, on a different telco. FNP(?) will destroy TM's monopoly on fix-lines, affecting its bottomline.