Looking on the internet deeply has found these results:

i will get back to you is the most popular phrase on the web.

I'll get back to you 111,400,000 results on the web	i will get back to you 128,500,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Like I said, I'll get back to you. Let me check with Jeff, and I'll get back to you. Right, leave this with me and I'll get back to you. Pencil me in for a "No, and I'll get back to you if anything changes". Let me review these materials and I'll get back to you. Let me speak again to Ruth and I'll get back to you. Thank you. I'll get back to you.	I will get back to you with the name you wanted shortly. I will get back to you on the detail when I have had a chance to study the matter. I will get back to you on all of this later. Well, I got to be somewhere, but I will get back to you. I will get back to you on all of this later. Let me check the details and I will get back to you with the results of my enquiries. I will get back to you very soon. You know what, let me check on the head count and I will get back to you with a number.

I'll get back to you

111,400,000 results on the web

i will get back to you

128,500,000 results on the web

More popular!

I will get back to you with the name you wanted shortly.
I will get back to you on the detail when I have had a chance to study the matter.
I will get back to you on all of this later.
Well, I got to be somewhere, but I will get back to you.
I will get back to you on all of this later.
Let me check the details and I will get back to you with the results of my enquiries.
I will get back to you very soon.
You know what, let me check on the head count and I will get back to you with a number.