"他会马上回你的电话。"

Translation: He will return your call at once.

[etherial82]

return your call?

[MoVprN]

Should accept: He will immediately return your phone call

[nailz.]

its not very natural English. When said like this, it is often to emphasise the 'immediately'.

[psqu6jbd]

How about "He will reply to your phone call straight away"

[SquishyLimeonade]

The developers should review those questions with lots of comments and feedback. It's equally natural to say "he will return your call immediately"

[hq4]

He will immediately return to your phone LOL

[KarenECase]

"Right away" means the same thing as "at once."

[etherial82]

return your call?

[NessaNessaJoy]

If this is "return your call",how would you say "return your phone"?

[Patrick_Dark]

Apparently, one would use "歸還", "還給", or "退還", which all mean "to return" in the sense of "to give back". This sentence uses "回", which means "to return" in the sense of "to reply to".

[Zeifly]

Agreed. 回 is more of a return to a destination/reply to something. To return an object to someone is 还.

[Han336780]

"He will give you a call back immediately" should be accepted.

[domsalazar0]

I thought this meant "return your phone" like he borrowed your phone for a minute and was going to give it back...

How would I know this meant return your call versus return your phone?

[KX3.]

That'd be 还你（你的电话）instead.

[Morv938426]

I love that 马上 means 'at once', but literally means 'on horseback'.

He will return your call - on horseback!

[DJJammur]

Isnt 马上 soon?

[hq4]

马上 = right away

[Braggadox]

In practice, yes.

[bould1]

He will immediately return your call..... c'mon "you guys"!!

[Mtyx.]

can someone explain the 的 here?
is this literally "the phone (call) of him who will immediately return (it) to you"

[KX3.]

你的电话 - your phone call, which is implied for him to have a call to return.

It are many uses, as you know, but I like the simple layout of this site: http://www.ctcfl.ox.ac.uk/lang%20work/grammar%20database/DeHandout.htm

[bas_rav]

"At once" feels not very common

[rs_taylor]

Return call or return the device?

[david998662]

Call?

[Farihastars]

What is wrong with "...reply your call..."?

[Diana6279]

He will return your phone call at once was marked wrong