Both are well spoken people. I don’t see any difference. I’m sorry and I will use the form 2. Sorry… the fact more than two. Unsuccessfully is an adverb which means the same thing as the prepositional phrase without success without a prepositional answer.

After reading there was a question marked “You can’t contact the customer for the price” but can you answer?” To avoid this very slight confusion, you can say I have unsuccessfully tried to contact the customer or I have tried to contact the customer, but have been unsuccessful.

Google shows that “tried unsuccessfully to contact him” has 205 results, “tried unsuccessfully to contact him” has 54 hits, while “tried to contact him, but was unsuccessful” has only 22.

Both are bad. Both of the above suggest you might have tried to fail, the

• second either that you failed to try, ie. You tried to try and failed, but you didn’t. You
• tried to fail.

I assume you want to say that you tried to see a change, but failed to get it through – the attempt was unsuccessful.

I have tried to contact the customer

but have no success. I won’t read the email

for

days! Is it better to write either one or neither?

I

have tried to contact the customer, but have been unsuccessful.

(Really. thanks

to Daniel )

Could you rearrange your answer slightly to avoid ambiguity?

If “without success” is not intended to be so, what is the context against “unsuccessfully”?

Personally, I fail to see how one can read either of your sentences (or my modified example) to mean that you have “tried to fail” since the adverb “unsuccessful” (or the adverbial clause “without success”) clearly pertains to the verb “to try”.

What are your first two sentences? Can you fix them?

Both sound completely wrong.

‘without success’ and ‘unsuccessfully’ both mean the same and can be interchangeably used in most scenarios.

I have tried to contact the customer without success” or “I have tried to contact the customer unsuccessfully” both imply your attempt (try) was without success/unsuccessful, whereas what you want to convey, was that you had tried to contact the customer, and were unsuccessful at contacting, not trying.

“I tried to contact the customer but was unsuccessful,” says Customer Support. I tried to contact clients but couldn’t. Sorry.