Lenovo K910L Smartphone - Manual (Page 4)

A Micro SIM card provided by your carrier is required in order to use
cellular services. Install the Micro SIM card as shown.
Installing the Micro SIM card
Step 1. Insert the Micro SIM eject tool into the hole on the Micro SIM
card tray.
Step 2. Pull out the Micro SIM card tray and place the Micro SIM
card in the tray.
Step 3. Carefully replace the tray.
Only Micro SIM cards work with your phone.
DO NOT insert or remove the Micro SIM card while your phone is
turned on. Doing so may permanently damage your Micro SIM card
or phone.
SIM