User Guide

Voltage Voltage (V) Condition
Higher extreme voltage 4.2 b
a. ADC settings in the SW might shutdown the phone above this value.
b. During fast charging of an empty battery, this voltage might exceed this value. Voltages between 4.20 and
4.60 might appear for a short while.
Main RF characteristics
Table 12 Channel numbers and frequencies
System Channel number TX frequency RX frequency Unit
GSM850 128 <= n <= 251 F = 824.2 + 0.2*(n -
128)
F = 869.2 + 0.2*
(n-128)
MHz
GSM900 0 < =n <= 124 F = 890 + 0.2*n F = 935 + 0.2*n MHz
975 <= n <= 1023 F = 890 + 0.2* (n -
1024)
F = 935 + 0.2*(n
-1024)
MHz
GSM1800 512 <= n <= 885 F = 1710.2 + 0.2* (n -
512)
F = 1805.2 + 0.2*
(n-512)
MHz
GSM1900 512 <= n <= 810 F = 1850.2 + 0.2* (n -
512)
F = 1930.2 + 0.2*
(n-512)
MHz
Table 13 Main RF characteristics
Parameter Unit and value
Cellular systems RM-272: EGSM900/GSM1800/GSM1900
RM-273: GSM850/GSM1800/GSM1900
RX Frequency range GSM850: 869 ... 894 MHz
EGSM900: 925 ... 960 MHz
GSM1800: 1805...1880 MHz
GSM1900: 1930...1990 MHz
TX Frequency range GSM850: 824 ... 849 MHz
EGSM900: 880 ... 915 MHz
GSM1800: 1710 ...1785 MHz
GSM1900: 1850...1910 MHz
Duplex spacing GSM850: 45 MHz
EGSM900: 45 MHz
GSM1800: 95 MHz
GSM1900: 80 MHz
Channel spacing 200 kHz
RM-272; RM-273
System module
Issue 1 COMPANY CONFIDENTIAL Page 5 –17
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