# data[].attributes.headline
Neck Pain. Increased stress. Headaches. Insomnia.

# data[].attributes.subject
Neck Pain. Increased stress. Headaches. Insomnia.

# data[].attributes.headline
In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "folding pocket telephone with a very thin carbon microphone." The early predecessors of cell phones included analog radio communications from ships and trains.

# data[].attributes.subject
In 1917, Finnish inventor Eric Tigerstedt filed a patent for a "folding pocket telephone with a very thin carbon microphone." The early predecessors of cell phones included analog radio communications from ships and trains.

# data[].attributes.headline
A mobile telephone (cell phone, etc.) is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as distinguished from a location telephone landline (landline phone).

# data[].attributes.subject
A mobile telephone (cell phone, etc.) is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as distinguished from a location telephone landline (landline phone).

# data[].attributes.headline
The first portable cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a phone that weighed 2 kilograms (4.4 lb).

# data[].attributes.subject
The first portable cellular mobile phone was demonstrated by John F. Mitchell and Martin Cooper of Motorola in 1973, using a phone that weighed 2 kilograms (4.4 lb).