Galaxy S21 5G

[jeffreykog]

It seems the Galaxy S21 is not supported. In the *#0808# menu, only 'MTP' and 'RNDIS + ACM + DM' are shown. When selecting the last option i don't get any data when i run scat using the following command:

jeffrey@lptp-jeffrey:~/projects/scat$ sudo python3 scat.py -t sec -m e333 -u -a 003:002 -i 4
Trying USB device at address 003:002
  CONFIGURATION 1: 0 mA ====================================
   bLength              :    0x9 (9 bytes)
   bDescriptorType      :    0x2 Configuration
   wTotalLength         :   0xa4 (164 bytes)
   bNumInterfaces       :    0x5
   bConfigurationValue  :    0x1
   iConfiguration       :    0x4 rndis_acm_dm
   bmAttributes         :   0xc0 Self Powered
   bMaxPower            :    0x0 (0 mA)
    INTERFACE 0: Wireless Controller =======================
     bLength            :    0x9 (9 bytes)
     bDescriptorType    :    0x4 Interface
     bInterfaceNumber   :    0x0
     bAlternateSetting  :    0x0
     bNumEndpoints      :    0x1
     bInterfaceClass    :   0xe0 Wireless Controller
     bInterfaceSubClass :    0x1
     bInterfaceProtocol :    0x3
     iInterface         :    0x5 RNDIS Communications Control
      ENDPOINT 0x82: Interrupt IN ==========================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :   0x82 IN
       bmAttributes     :    0x3 Interrupt
       wMaxPacketSize   :    0x8 (8 bytes)
       bInterval        :    0x9
    INTERFACE 1: CDC Data ==================================
     bLength            :    0x9 (9 bytes)
     bDescriptorType    :    0x4 Interface
     bInterfaceNumber   :    0x1
     bAlternateSetting  :    0x0
     bNumEndpoints      :    0x2
     bInterfaceClass    :    0xa CDC Data
     bInterfaceSubClass :    0x0
     bInterfaceProtocol :    0x0
     iInterface         :    0x6 RNDIS Ethernet Data
      ENDPOINT 0x81: Bulk IN ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :   0x81 IN
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :    0x0
      ENDPOINT 0x1: Bulk OUT ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :    0x1 OUT
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :    0x0
    INTERFACE 2: CDC Communication =========================
     bLength            :    0x9 (9 bytes)
     bDescriptorType    :    0x4 Interface
     bInterfaceNumber   :    0x2
     bAlternateSetting  :    0x0
     bNumEndpoints      :    0x1
     bInterfaceClass    :    0x2 CDC Communication
     bInterfaceSubClass :    0x2
     bInterfaceProtocol :    0x1
     iInterface         :    0x9 CDC Abstract Control Model (ACM)
      ENDPOINT 0x84: Interrupt IN ==========================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :   0x84 IN
       bmAttributes     :    0x3 Interrupt
       wMaxPacketSize   :    0xa (10 bytes)
       bInterval        :    0x9
    INTERFACE 3: CDC Data ==================================
     bLength            :    0x9 (9 bytes)
     bDescriptorType    :    0x4 Interface
     bInterfaceNumber   :    0x3
     bAlternateSetting  :    0x0
     bNumEndpoints      :    0x2
     bInterfaceClass    :    0xa CDC Data
     bInterfaceSubClass :    0x0
     bInterfaceProtocol :    0x0
     iInterface         :    0xa CDC ACM Data
      ENDPOINT 0x83: Bulk IN ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :   0x83 IN
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :    0x0
      ENDPOINT 0x2: Bulk OUT ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :    0x2 OUT
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :    0x0
    INTERFACE 4: Vendor Specific ===========================
     bLength            :    0x9 (9 bytes)
     bDescriptorType    :    0x4 Interface
     bInterfaceNumber   :    0x4
     bAlternateSetting  :    0x0
     bNumEndpoints      :    0x2
     bInterfaceClass    :   0xff Vendor Specific
     bInterfaceSubClass :   0x10
     bInterfaceProtocol :    0x1
     iInterface         :    0x0 
      ENDPOINT 0x85: Bulk IN ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :   0x85 IN
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :    0x0
      ENDPOINT 0x3: Bulk OUT ===============================
       bLength          :    0x7 (7 bytes)
       bDescriptorType  :    0x5 Endpoint
       bEndpointAddress :    0x3 OUT
       bmAttributes     :    0x2 Bulk
       wMaxPacketSize   :  0x200 (512 bytes)
       bInterval        :    0x0
2021-02-09 12:02:55,100 scat.samsungparser (stop_diag) INFO: Stopping diag
2021-02-09 12:02:55,101 scat.samsungparser (init_diag) INFO: Initialize diag
2021-02-09 12:02:55,102 scat.samsungparser (run_diag) INFO: Starting diag
^C2021-02-09 12:04:57,170 scat.samsungparser (stop_diag) INFO: Stopping diag

It seems it is properly detecting some interfaces, but no UP/CP data is sent to localhost. I don't think this can be changed by a configuration option, but don't know the modem internals.

[HandyMenny]

See #27 there isn't much you can do if samsung has "blocked" diag in your firmware

Someone solved enabling "AT 3GPP commands" in developer options, but your mileage may vary

[jeffreykog]

Thanks for your response. Enabling the 3GPP AT commands doesn't seem to help, so i think i'm out of luck with a locked-down modem firmware.

[yurguis]

Did you try changing the last parameter from python3 scat.py -t sec -m e333 -u -a 003:002 -i 4 for me -i sometimes works with 1 instead of 4, even though I use a Qualcomm phone, don't know if for Exynos would be the same.

[Cainor]

Same issue. Is it just a Samsung thing?