For instructions on how to put your phone into airplane mode, refer to your phone manufacturer.
Many guests choose to put their phone in airplane mode but use Wi Fi signals onboard or onshore to retain data communication.
Since voice calls are usually prohibitively expensive, here are some ideas for low cost ways to communicate with a phone.
In the early 1980s, Bell Labs received a patent for what became AT&T's "Advanced 800 Service", a computer-controlled system where any toll-free number could point to any destination number, such as to a small business local number instead of a special In WATS line, and an itemized bill generated only for the calls the business actually received.
By breaking the link between the number's exchange prefix and geographic location, this system opened opportunities for vanity number advertising – an advantage in media like commercial radio where numbers need to be memorable.
In addition, 899 is reserved as a member of the series x9x for future numbering plan expansion.
Calls to these numbers are free to the caller if dialed from land-line phones, but may incur mobile airtime charges for cellular phones.