The best way to learn proper English is to read news report, and watch news on TV. Watching TV shows is a great way to learn casual English, slang words, understand culture reference and humor. If you have already watched these shows then you may recall the words used in the following dialogs.

-remember my TELEPHONE number.
-That’s why I said that.
Money Heist Season 1, Episode 1

Telephone wires can't electrocute you,
can they?
The Big Bang Theory Season 2, Episode 7

RAQUEL’S UNKNOWN’S TELEPHONE
Money Heist Season 1, Episode 13

Can I come in and watch him
invent the TELEPHONE?"
The Big Bang Theory Season 1, Episode 14

To be fair, I watched E.T. build a TELEPHONE
out of a Speak & Spell and an umbrella.
The Big Bang Theory Season 8, Episode 21