User Manual

Reference Information
49
Reference Information
EFR encoding decoder function
The D5
（
GSM/DCS
）
is equipped with the latest
encoding decoder and audio frequency technology,
to achieve superior audio quality.
At present, there are 3 types of encoding decoder
compatible with GSM/DCS:
y
Enhance full rate
（
EFR
）
y
Full rate
（
FR
）
y
Half rate
（
HR
）
The D5 (GSM/DCS) mobile phone supports the
normally-used EFR and FR encoding decoder.
All GSM and DCS cellular networks and phones
support FR encoding decoder.
If supported by the network operator, the network
operator will automatically select the relevant
encoding decoder, which will be either EFR or FR.
The D5 model is programmed to automatically
select the EFR where this is supported by the
network, allowing you to enjoy the superior audio
quality provided by EFR. Otherwise the phone will
select FR.
At present, only some networks support both the
FR and EFR encoding decoder.
If the network operator cannot support EFR, the
D5 (GSM/DCS) mobile phone will automatically
adopt the FR encoding decoder.
Accessories
The accessories for the D5 model (GSM/DCS)
mobile phone include battery, charger etc. Please
refer to “Battery charging” for the battery charging
method.
Battery
At present, the rechargeable battery approved by
the manufacturer is the lithium battery (LI-ION).
The talk time and standby time for a new battery is
about 2–3 hours and 50-150 hours respectively.
When the battery is fully charged, you can have a
continuous talk time for a few hours and standby
time for a few days. The capacity of a battery may
vary depending on the environment, networks, SIM
card or options available.
Charger
This is a lightweight charger compatible with a
multi-voltage supply. Do not connect it to an
incompatible product. It charges the phone battery
rapidly. To start charging, plug the charger into a
power supply and insert the other end into the
charge port at the bottom of your phone to start
charging.
The required charging time is approximately 5
hours. The battery charging status can be checked
on the mobile phone display.