Lenovo A3000 Tablet - Manual (Page 8)

This function requires support from your wireless carrier.
Touch > Call. Now you can input your number or choose a number
from the call history or Contacts.
operators 13800000000
Phone
Options
Hide dial pad Show dial pad
Mute on/off
Microphone on/off
Suspend call
Add call
*Multiparty service is required to use the teleconference function.
Teleconference*
Making a call