Question about Cell Phones

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I have exactly the same problem. My cell is also a ZTC K300.

The problem is in second SIM slot. The both chips that I use are working well, the problem is always on the one that I put on the second SIM card slot.

Please felipe, if you find any solution for this problem get in touch with me.

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  • renanfig Sep 05, 2009

    I´m sorry willyinpr4u. I´ve just created my account here on fixya and I don´t know how to use it very well.

    My problem is the same of this topic: http://www.fixya.com/support/t2862938-zt...
    by felipelzb. I´ve clicked on the " I Have a Similar Problem" button and I thought that my comment would appear on that same topic. But anyway, i have already activate both slim slots on the "Dual SIM Settings" menu. The funny thing is that the SIM in the slot #2 doesn´t work for phonecalls (appears "invalid SIM" on the display) but its contact list on the phonebook is working well.

  • William Alequin May 11, 2010

    If you people want some help, never start the thread with "I have the same problem". We on the other end, never see all the problems that are related in the same page or same thread. Right now I don't have any idea what kind of problem you have with your China phone. If you could be more specific maybe we could be able to help you. Is the sim slot # 2 not working? How about going to the sim profile and activate both sim slots. Does one of them give you the contact's list but not the other one? One is always going to be the master and the other one the slave, so the contacts shown are going to be from the Sim master. Be more specific please, good day.

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  • Cell Phones Master
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OK, try troubleshooting the problem like this: Go to the Sim's profile in the background, it should be in the third page. It have a sim icon, tap on it and verify that the dual sim is checked. Now go to the settings in the main page, tap it and go to the network set up, tap it, now here if you have both sim cards install, choose the one that you are having trouble with, I believe that is sim slot #2, so choose sim 2, and tap on network set up, and choose the network that service the sim card. If that doesn't work, check the imei number for the sim 2, and compare it from the one in the back cover, if they don't match, you need to change the imei number. Go to www.mysciphone.com and download a program that allows you to change the imei, just in case, good luck.

Posted on Sep 06, 2009

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