This tool can help you calculate the frequency of different system:
** Supported system=> GSM, WCDMA, CDMA2000, LTE, and WIFI
** All the frequency and formula are referred from 3GPP (GSM, WCDMA, and LTE), 3GPP2 (CDMA2000), and IEEE802.11n (WIFI)
** The general used bands are created
** The corresponding channel range, frequency range and Low, Mid, High channel will be shown.
** The radio button can be clicked for "Keyin CH to calculate frequency" or "Keyin Freq to calculate channel"
** Click "calculate", the results will be shown at bottom of the screen.