COS from F1 to H4

[Patra16]

Hi There,

I am on my F1- STEM OPT and working, I have applied for COS for H4, with an effective date of 15th April 2024. Recently my H4 visa was approved, is it i will be able to work on my F1 till April 15th, 2024, or I have to stop working?

 

[newacct]

So you got an I-797A approval notice with a new I-94 as part of it, right? Does it say what date it is valid from?