In general the pools etc do have times.
Phones....basically a phone doesn't know where it is, so routes calls back to where it lives then from there to where you asked it to call ....so if I call my wife on the ship it goes via the UK & as far as I know I get charged for the UK part & she gets charged for the overseas bit. Avoid using phones on ships, it can be VERY expensive. If you have one of these new fangled phones that goes online etc. TURN IT OFF you will be charged for stuff it tries to do.
If you use your cell phone the call will cost you $2.95/minute no matter who you call.
Calls, using ship phones, within the ship are free. Calls, using ship phones to any phone number that isn't the ships will cost you $6-$10/minute.
Almost all phones that have data capability can have the date mode disabled. Check your phone to find out how to "Disable Data". Emails, texts and web browsing will cost more.
This whole matter of phones at sea is very complicated. Any information published today may well change tomorrow.
It is VERY IMPORTANT that you check carefully with your cell phone carrier and find out exactly how it works. Then be sure you check carefully the information on board the ship and find out how it works. While the information Mike posts above is fairly generally true these days, it may differ from line to line and ship to ship and from cruise to cruise and from phone provider to provider.
Unless there is some strong business reason for calling and your company is picking up the tab, I suggest packing your cell phone away for the trip and leaving the ship's contact number with the folks at home (your TA can get it for you.) Then you sit back and enjoy the cruise, knowing that if Aunt Jane gets the hiccups you won't be bothered but if your brother breaks his leg they can get hold of you. We got along without cell phones for 35 years of cruising before cell phones became available and we still do it!
One important use for cell phones, however, is meeting up with a private guide at the port. On a couple of occasions we needed to call the number the guide gave us in order to get together with them.
When we get aboard the ship, I call my son to tell him we are aboard. I turn the phone off, into the safe it goes and there she stays until we are in the car and on the way home. He knows how to contact the ship in a dire emergency, although I can't think of too many that I could do too much about anyway.
In 39 cruises, I've yet to lose my wife, although I tried numerous times !
Just a little planning can take care of keeping up with each other. In spite of what a lot of folks say and in spite of how large the ships are supposed to be, it's difficult to " lose " someone unless they don't want to be found !
I'm a believer in going on vacation --to vacate--to get away-- to be rid of problems and things and people back home--not stay tethered to them via an electronic leash.
Oh--by the way--did anyone see on the news a couple days ago this lady was in a mall somewhere walking along texting and not looking where she was going and walked into and fell into the fountain? Now she has an attorney !