French phrase
Je vous recontacterai d'ici ~.
Meaning
I'll get back to you by ___.
When to use it
It promises renewed contact by a specified deadline. Common in both casual and professional speech.
Example dialogue
Quand pouvez-vous me recontacter ?
When can you get back to me?
Je vous recontacterai d'ici demain.
I'll get back to you by tomorrow.