See my answers below your questions.

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Jim Humphries,
Former Visa Officer
> Hi All
> My wife and I are both planning to relocate to work in Dubai from
[quoted text clipped - 4 lines]
>
> 1. Does anybody know the approximate time frame for a couple to obtain
Probably 4 to 5 years without an approved job offer.
> PR from Dubai.
> 2. Can I reach Dubai and apply in the first or the second month? So long
> as you have permission to remain at least one year in Dubai you can apply
> from there.
> 3. Is it time frame to apply from Dubai is faster than applying in
> Bangalore, India.
Perhaps a little faster but not necessarily.
> Thanks In Advance
There is no timeframe as to when you can apply. As long as you have legal
status in Duabi you can apply. It usually takes 24 months+ from Dubai. If
you know u are gonna be in Dubai for the next two years then apply from
Dubai or else apply from Banglore.
Good Luck.

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> Hi All
> My wife and I are both planning to relocate to work in Dubai from
[quoted text clipped - 10 lines]
>
> Thanks In Advance