Question: how much is 1 gigabyte on a cell phone?
Answer: One megabyte (MB) is made up of 1,024 kilobytes (KB). The next measurement up is a gigabyte (GB), which is made up of 1024MB. The most popular plans offered by mobile phone companies are 1GB, 2GB or 5GB of mobile data allowance. But deals can start as low as 100MB depending on your needs.