You are roaming only when you are out of your calling area. If you live in CA and call Maryland from within your calling area, it's not roaming. However, if you live in Maryland and calling from CA, you are roaming.
No. The person making the call in Canada is charged for the call. The only 'variation' would be if the Canadian caller revered the charges.
No it doesn't. Charges apply only when the call is received!
That depends on your plan and coverage area. Unless you have a special cell package for the job corps that likely does not matter in terms of roaming.
A cell phone has a home service area. When a person leaves that area and the phone is trying to find a source of connection to a cell tower, it is roaming. Most times higher per-minute charges are incurred when roaming.
To call a mobile phone that is roaming in the United States, you dial the number the same way that you would if the mobile is in its home country. The same is true no matter what country you're roaming in.
Yes, it is pretty expensive. Normally both parties pay the price of the call. Ask your cell network for the rates while 'roaming'. But it depends on the country and carrier. In Australia there is no charge to the called party for incoming calls. This is because you can't be charged for things you don't originate or have control over. Therefore, you can be called from anywhere in the world without charge. If you take your Australian cell phone to another country - then you start to incur international roaming which will cost.
The amount a person is charged to call YOU - is completely irrelevant to YOUR call plan. They will be charged whatever fee THEIR network sets.
No you don't get charged. They will because they called you and you received the call. You are only charged for calls you make.
No - the only time they emit radiation is when they're actually in use making or receiving a call.
Nope - you only get charged for the call once the phone at the other end is answered.
Just dial the UK mobile number. It does not matter that the mobile is roaming in Ireland (or anywhere else); the network will automatically locate the mobile, and the roaming mobile user will pay any applicable roaming surcharges.