Whilst arguing with serge in iie 6,6,1...
my wife passed by...
"How old is a kid when he could talk and hold a phone well enough to speak to someone."
She said "around 3"
At the time that pissed me off.
However I now site that a part 1 of my the kids were 4,3,and 3. defence.
31 to 36 months
By the time he turns 3, your child will be a more sophisticated talker. He'll be able to carry on a sustained conversation and adjust his tone, speech patterns, and vocabulary to fit the person he's talking to in a particular situation. For instance, he'll often use simpler words with a peer ("I need go potty") but more complex constructions with you ("I need to go to the bathroom"). By now, other adults, including strangers, should be able to understand almost everything he says, which means you'll have to do less translating. He'll even be a pro at saying his first and last name and his age — and will readily oblige when asked.
Thats part two...
2-3 years
By now your toddler will understand two stage commands ("Get your socks and put them in the basket") and understand contrasting concepts or meanings like hot / cold, stop / go, in / on and nice / yuccy. He or she notices sounds like the telephone or doorbell ringing and may point or become excited, get you to answer, or attempt to answer themselves.
3-4 years
Your three or four year old understands simple "Who?", "What?" and "Where?" questions, and can hear you when you call from another room. This is an age where hearing difficulties may become evident. If you are in doubt about your child's hearing, see a clinical audiologist.
I site the above as part three....
The tradegy is withy , my own , I can't honestly remember.