Verykool i603 - Manual (Page 11)

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without a SIM card can still make emergency calls.
Enter the emergency number, press the Send key to make an emergency
call.
Note: As with any mobile phone, due to the network coverage reasons
or wireless signal transmission case ， may not support the
characteristics of the mobile phones，Some networks do not even
support the 112 emergency call service. Thus, for particularly critical
communications (eg: medical emergencies), should not rely solely on
mobile phones. Please check with your local network operator and
reconciliation.
4.3 International calls
In the idle screen press "+" key then in turn enter the country code, area
code and telephone number.
Press dial key to make international calls.
Note: International dialing code of some networks is not "+" sign,
please be discretion.
4.4 Answer the call
If there is an incoming call, press the Send key to answer the phone, hang
up the keys to reject a call.
Press the End key to end the call.
4.5 adjust the volume
During the call you can press navigation left and right to adjust the volume.
4.6 Talk hands-free
During the call you can press the right key to open or close hands-free.
4.7 Call waiting
Conference call feature requires opening Call Waiting ， If the network
supports call waiting and you start this feature，During a call when there are
new calls you will hear the call waiting tone, you can answer or reject the
new call. Enter the "call waiting" feature to enable or disable call waiting.
4.8 Call options
In the state of calling, press LSK to enter the call option.
In call option，You are able to hold / retrieve, end single call, new call,
Phonebook, call history, messaging, sound recorder, mute, Volume and
other operations.