From cell phone use to high-speed Internet access, the connected life is spreading to the skies. In January, Emirates airline plans to launch mobile phone usage in its planes, making it the first airline to allow passengers to make cell phone calls on its flights. And Australian carrier Qantas plans to start evaluating technology that lets fliers use their cell phones and PDAs during flight early next year. Fliers have long been able to keep in touch with those on the ground by using phones built into the backs of airplane seats. But the costs of those seatback phones can be upwards of $10 a minute, plus a connection fee. In contrast, the cost of calls made in-flight on Emirates will be in line with international roaming rates, the airline said. Those rates vary by mobile carrier and by location but can be as low as $1 to $2 a minute.