Looking on the internet deeply has found these results:

once he replies back is the most popular phrase on the web.

once he reply back 10 results on the web	once he replies back 19 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	On the other hand, when we call Allah once, He replies back to us 70 times by saying "Labbaik Ya Abdi (I am here oh My slave)." How unfortunate we are that ... What if there was a way to pull it out of a working phone and once he replies back we will see. Also he was on 5.0.1 then to 4.4.2 then Ota. ~All truth goes through three phases. First, it is ... On the other hand, when we call Allah once, He replies back to us 70 times by saying "Labbaik Ya Abdi (I am here oh My slave). Once he replies back with the actual modem model I will know exactly whats going on.

once he reply back

10 results on the web

once he replies back

19 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

On the other hand, when we call Allah once, He replies back to us 70 times by saying "Labbaik Ya Abdi (I am here oh My slave)." How unfortunate we are that ...
What if there was a way to pull it out of a working phone and once he replies back we will see. Also he was on 5.0.1 then to 4.4.2 then Ota.
~All truth goes through three phases. First, it is ...
On the other hand, when we call Allah once, He replies back to us 70 times by saying "Labbaik Ya Abdi (I am here oh My slave).
Once he replies back with the actual modem model I will know exactly whats going on.