> I would not suggest that neither. Usually Dns update around the world in
> about 15 min.
> And most dns providers don't care for the TTL value you put so it's not bad
> to change the ttl but it will most likely not do anything.
Some do recognize TTL and some don't. Set the ttl for 5 minutes about 6
hours before the change. Once it is stable, set it back to 4 hours.
And recognize that some providers will ignore what you do. (However,
all of the ones I have seen respect TTL)