838win 19 Make sure the SIM card is properly positioned into the slot before installing the battery and closing the back cover. To open the back cover of the ZTE Zinger phone, go to the bottom side of the phone towards the mouthpiece, and then look for the empty slot on the left side. Locate the small black tab inside the phone, press it gently and insert the SIM card. To confirm whether the SIM card has been installed properly, switch on your phone, and check the network bar. The metal contact section of the SIM card should face downwards when inserting the SIM card into the SIM card slot. Articles that are common to both categories - the suspension .