Definitions for "Tri-band"
Keywords:  gsm, mhz, band, dual, usa
a phone capable of operating on three different digital frequencies (example: 900MHz, 1800MHz and 1900MHz).
A tri-band mobile phone is capable of operating on three frequency bands, 900mhz, 1800mhz and 1900mhz. A tri-band phone is needed to if you wish to use your phone in the USA. .OBox { DISPLAY: none } Universal Mobile Telephone System (UMTS) Unlocked Upgrade Universal Serial Bus (USB) USB Pen Drive
A phone which can operate on 3 different radio frequencies.
Keywords:  tty, mode
Tri-Mode TTY