I think its fair to give them some time.
How long is some time?
Personally, i think 2 months is the most i can give.

YB Gobind announced this on the first day of him starting office. If Maxis cant provide clear information on update / upgrade close 1 to 2 months after TM's offer, I would port out. Totally, not acceptable as more than enough time was given. Their wait and see approach not customer friendly at all, its same like TM except now TM is finally moving.