# Connecting Link G4+ to Samsung S21 not working **URL:** \ **Category:** General\ **Created:** [August 7, 2023, 8:16pm UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501 "2023-08-07T20:16:06Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Corky\_91](https://forum.realdash.net/letter_avatar_proxy/v4/letter/c/6de8d8/32.png) [@Corky\_91](https://forum.realdash.net/u/Corky_91)\ **Post date:** [August 7, 2023, 8:16pm UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/1 "2023-08-07T20:16:06Z")
Hi All, I recently downloaded the RealDash app on my Android device, Samsung S21, but I’ve not yet been able to connect it to my phone via USB \> USB type C cable. I’ve followed the steps here to make sure the settings on the Link are configured correctly - [How to connect to Link ECU](https://forum.realdash.net/t/how-to-connect-to-link-ecu/80) I’m using a USB type C OTG adapter and I’ve successfully connected to a friends One Plus 9, but still am not able to connect it to my phone. I don’t see any differences in the settings for USB on my phone. Is there something I am missing in order to get this connected? ---
**Author:** ![realdashdev](https://forum.realdash.net/user_avatar/forum.realdash.net/realdashdev/32/6_2.png) [@realdashdev](https://forum.realdash.net/u/realdashdev)\ **Post date:** [August 8, 2023, 10:14am UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/2 "2023-08-08T10:14:18Z")
What ECU is that? Not all Link ECUs support the direct USB connection. ---
**Author:** ![Corky\_91](https://forum.realdash.net/letter_avatar_proxy/v4/letter/c/6de8d8/32.png) [@Corky\_91](https://forum.realdash.net/u/Corky_91)\ **Post date:** [August 8, 2023, 12:43pm UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/3 "2023-08-08T12:43:28Z")
This is a Link G4+ ECU. I was able to connect to a One Plus 9 phone, so I assume the issue is with my Android device and not the ECU itself. ---
**Author:** ![realdashdev](https://forum.realdash.net/user_avatar/forum.realdash.net/realdashdev/32/6_2.png) [@realdashdev](https://forum.realdash.net/u/realdashdev)\ **Post date:** [August 9, 2023, 6:27am UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/4 "2023-08-09T06:27:09Z")
One thing that comes to mind is the USB device permissions. When you connect the USB to your device, do you get a system popup asking what app is allowed to use the USB? ---
**Author:** ![Corky\_91](https://forum.realdash.net/letter_avatar_proxy/v4/letter/c/6de8d8/32.png) [@Corky\_91](https://forum.realdash.net/u/Corky_91)\ **Post date:** [August 9, 2023, 12:55pm UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/5 "2023-08-09T12:55:02Z")
Nope, nothing pops up when i plug in the ECU, almost like it doesnt recognize it. When i plug in the USB OTG adapter itself it does recognize soemthing is connected, but if i then connect the USB from the Link it doesn’t show any further pop ups. ---
**Author:** ![kato](https://forum.realdash.net/letter_avatar_proxy/v4/letter/k/439d5e/32.png) [@kato](https://forum.realdash.net/u/kato)\ **Post date:** [August 10, 2023, 7:55am UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/6 "2023-08-10T07:55:01Z")
Hi, In my case, when I changed from Pixel 3a to 7a, I could not connect. I had other OTG adapter, so I replaced them with that and was able to connect. I am not sure of the specs of the OTG adapter, but I would suggest trying another OTG adapter. I’m happy if this helps. ---
**Author:** ![KD\_AUTOMOTIVE](https://forum.realdash.net/letter_avatar_proxy/v4/letter/k/85f322/32.png) [@KD\_AUTOMOTIVE](https://forum.realdash.net/u/KD_AUTOMOTIVE)\ **Post date:** [December 28, 2023, 4:00pm UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/7 "2023-12-28T16:00:16Z")
Made an account to maybe shed some light on this topic, you will need to turn on USB de bugging on your Samsung, a quick google will explain how to do this, hope this helps ---
**Author:** ![psedog](https://forum.realdash.net/letter_avatar_proxy/v4/letter/p/439d5e/32.png) [@psedog](https://forum.realdash.net/u/psedog)\ **Post date:** [December 30, 2023, 5:19am UTC](https://forum.realdash.net/t/connecting-link-g4-to-samsung-s21-not-working/3501/8 "2023-12-30T05:19:04Z")
Wow, I never even thought this was possible. I always went through a ODBII adapter. This keeps it wireless as well, so charging isn’t an issue. Get a good OBDII adapter that supports CAN and it’s realtime. Note: I also have a Link G4+