the same time as you

[tufguy]

1) Can you drop me a message on my phone the same time as you start the annual meeting?

2) Can you check your office software the same time as you leave for lunch?

Are these correct

 

[Yankee]

1) Can you drop me a message on my phone at the same time as you start the annual meeting?

2) Can you check your office software at the same time as you leave for lunch?

Are these correct

Both your originals work, but you could also hear/say as above.

 

[99bottles]

1) Can you drop me a message on my phone the same time as you start the annual meeting?

2) Can you check your office software the same time as you leave for lunch?

Are these correct

NOT A NATIVE.

Can you drop me a message on my phone when you start the annual meeting?

Can you check your office software when you leave for lunch?

 

[Tdol]

When is far more natural to me.