Diffrent companies depending on the phone. Some examples: iPhone, Apple Blackberry, Blackberry.
20,000 cell phones were sold!! :D
Ericsson makes cell phones
Do you mean 'When were the first cell phones sold?' If so, the answer is in the mid 1980s.
The first cell phones were not sold to the public, but were only used by the government. This was in 1974 and it wasn't until 1984 that cell phones were sold to the public.
A lot of cell phones are made a year but I don't know the exact # of cell phones though
Samsung
Jesus and qualcomm
M.I.C IS the company which creates barbie cell phones.
T Mobile carries many different brands of cell phones including Samsung, Android based droid phones, Blackberries (which our out of style) and other smartphones.
Yes. GSM phones (phones sold by T-Mobile and AT&T) use triangulation.
The idea of cell phones dates from the 1920's and police radios, but the first cell was made by Bell labs in 1947. It wasn't until 1973 that Dr. Martin Cooper of Motorola made a cell that could be used. From 1973-1984 it was sold only for government work. In 1984 the first public cell phones were sold. The phones of that time were large, heavy, and copied land line phones. They were carried in a zippered bag with a battery taking up the entire bottom.
The invention of radio. In the 1930's radios were put in police cars and there was a suggestion of phones. In 1947 the first cell phone was made, but it didn't work very well. Motorola came up with the first working cell phone by Dr. Martin Cooper in 1974. The first cell phones were sold to the government and in 1984 were finally sold to consumers.