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MTK helio x20 Mediatek MT6797x CARBAYTA tablet no mobile network bars or calls

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    MTK helio x20 Mediatek MT6797x CARBAYTA tablet no mobile network bars or calls

    Tablet recognizes sim but doesn't show network bars & doesn't connect to any mobile network to make calls /SMS or data.
    Usually, the SIM card which I put in the tablet the apn for that carrier comes up automatically as it can read the carrier but just doesn't bring them in the list of networks available. A couple of networks comes of another carrier of 2g or 3g (forbidden) written in front of them & the network which comes can't connect to them.

    it gives some kind of driver for Mediatek MT6797x (the chip I have in my tablet of CARBAYTA Processor Manufacturer: MTK helio x20 Screen size: 11.6 inch
    Network: 4G TLE & WIFI, CPU: MTK 6797, 10 cores


    When phonedoctor ran to test call function:
    it ran: The system will test the connection to the mobile network operator automatically: Network operator, Network name, Access Technology, Support VOIP: = all came blank but in the main menu where call function is there, it gave a green checkmark & today's date.

    In Cellular Network option when ran :
    Turn off Wi-fi, Turn on mobile data and make sure you're connected to your mobile network. Press the [start] below to start the test.
    Check chip : ok , Public Ip: x , Check error packet : 0

    Public ip had a red cross sign.
    when back to the main menu Cellular Network option had a red cross in a circle.

    Seems like it can't read the apn settings of the current mobile carrier or not able to connect to the mobile tower nearby.
    But when I ran some other apn settings app it does read the nearby power & some information I get is as follows :



    Current network :
    Signal strength : -93dbm 26 asu
    Voice service : Emergency calls only
    Data Service : Disconnected
    Voice Network Type : Unknown
    Data Network Type : Unknown
    Voice call status : idle
    Roaming : Not roaming
    Set preferred Network type : LTE /TD-SCDMA/UMTS
    run ping test : fail
    ping Hostname (####google####) IPv4 : Fail(2)
    ping Hostname (####google$###) IPv6 : Fail(2)
    HTTP Client Test : Fail: IOException

    Data Connection Real Time info:
    Message Waiting : false
    Call Redirect : false
    Data sent : 0pkts, 0 bytes
    Data Received : 0pkts, 0 bytes
    Number of PPP Reset Since Boot :
    Mobile Radio Power - checked
    VoLTE provisioned - checked
    Video Calling Provisioned - checked

    SMSC : (+###-###-####) (brings up a mobile number of nearby tower when freshed.

    Toggle DNS Check : 0.0.0.0 allowed

    Cell info refresh rate (deprecated): choose immediate
    Neighbor Cell info (deprecated) No neighboring cells

    ALL Cell mesurement info
    WCDMA

    SRV MCC MNC LAC CID UARFCN PSC RSCP
    s 404 11 30041 68536 10757 53 -49
    404 11 30041 68536 10757 53 -49


    Above is some info i was able to get from some apn testing software.
    Please let me know how can I get at least basic calls /SMS functions to work & tablet to get mobile bars. Tablet is without mobile network bars.

    I do appreciate in advance if you can put me in the right path to get network bars.
    Thanks
    Attached Files

    #2
    Originally posted by learnmobile View Post
    Tablet recognizes sim but doesn't show network bars & doesn't connect to any mobile network to make calls /SMS or data.
    Usually, the SIM card which I put in the tablet the apn for that carrier comes up automatically as it can read the carrier but just doesn't bring them in the list of networks available. A couple of networks comes of another carrier of 2g or 3g (forbidden) written in front of them & the network which comes can't connect to them.

    it gives some kind of driver for Mediatek MT6797x (the chip I have in my tablet of CARBAYTA Processor Manufacturer: MTK helio x20 Screen size: 11.6 inch
    Network: 4G TLE & WIFI, CPU: MTK 6797, 10 cores


    When phonedoctor ran to test call function:
    it ran: The system will test the connection to the mobile network operator automatically: Network operator, Network name, Access Technology, Support VOIP: = all came blank but in the main menu where call function is there, it gave a green checkmark & today's date.

    In Cellular Network option when ran :
    Turn off Wi-fi, Turn on mobile data and make sure you're connected to your mobile network. Press the [start] below to start the test.
    Check chip : ok , Public Ip: x , Check error packet : 0

    Public ip had a red cross sign.
    when back to the main menu Cellular Network option had a red cross in a circle.

    Seems like it can't read the apn settings of the current mobile carrier or not able to connect to the mobile tower nearby.
    But when I ran some other apn settings app it does read the nearby power & some information I get is as follows :



    Current network :
    Signal strength : -93dbm 26 asu
    Voice service : Emergency calls only
    Data Service : Disconnected
    Voice Network Type : Unknown
    Data Network Type : Unknown
    Voice call status : idle
    Roaming : Not roaming
    Set preferred Network type : LTE /TD-SCDMA/UMTS
    run ping test : fail
    ping Hostname (####google####) IPv4 : Fail(2)
    ping Hostname (####google$###) IPv6 : Fail(2)
    HTTP Client Test : Fail: IOException

    Data Connection Real Time info:
    Message Waiting : false
    Call Redirect : false
    Data sent : 0pkts, 0 bytes
    Data Received : 0pkts, 0 bytes
    Number of PPP Reset Since Boot :
    Mobile Radio Power - checked
    VoLTE provisioned - checked
    Video Calling Provisioned - checked

    SMSC : (+###-###-####) (brings up a mobile number of nearby tower when freshed.

    Toggle DNS Check : 0.0.0.0 allowed

    Cell info refresh rate (deprecated): choose immediate
    Neighbor Cell info (deprecated) No neighboring cells

    ALL Cell mesurement info
    WCDMA

    SRV MCC MNC LAC CID UARFCN PSC RSCP
    s 404 11 30041 68536 10757 53 -49
    404 11 30041 68536 10757 53 -49


    Above is some info i was able to get from some apn testing software.
    Please let me know how can I get at least basic calls /SMS functions to work & tablet to get mobile bars. Tablet is without mobile network bars.

    I do appreciate in advance if you can put me in the right path to get network bars.
    Thanks
    Hi ,

    did you ever used MTK EngineerMode , there are Ways to open it , best to use a App from Store to check it ,

    good luck / gefattern

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