[Q] SPH-L720 Diag mode not working - Sprint Samsung Galaxy S 4 Q&A, Help & Troubleshoot

Hey guys need help getting my phone to connect to PC in diag mode.
My phone will enter diag mode (thru the ##3424#) but my computer won't detect it as a port (in device manager)
I verified that it wasn't the USB cable or my drivers by connecting another phone in diag mode (s3)
Any assistance would be appreciated.
ps I tried the 9090 trick no luck

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I can't get Mogul to connect to PC in DIAG mode (##3424#)
I put it in DIAG mode (##3424#) a screen saying DMR v 1.87 pops up. Then I connect it to PC, but PC don't see Mogul as hardware. In ActiveSYNC mode I connect Mogul with no problem. A few weeks ago everything was Ok. I was able to connect it in in DIAG mode and work with QPST.

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hello! I need some help to my phone,after i rooted to eclair 2.1v,my computer don't recognize my phone anymore,I set to usb debugging mode before to connect to my computer still can connect.My phone model SG3 I5800L,I try to use samsung kies,it's say unable to connect I5800L pls help. I want to unlock my phone.
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[Q] Help can't access diag mode LG G2 D803

I can't get into DIAG mode when I enter ##3424# (##DIAG#). Is there a different sequence for the D803 model? Or is there a manual way of getting this device into diagnostics mode?
I have all the drivers downloaded and device manager shows under Android USB Devices AndroidNet Sooner Single ADB Interface)
and under Ports shows LGE AndroidNet USB Serial Port (COM8) which is exactly what I want just can't seem to get DIAG mode to work.
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SPH-L720 Diag mode not working

Hey guys need help getting my phone to connect to PC in diag mode.
My phone will enter diag mode (thru the ##3424#) but my computer won't detect it as a port (in device manager)
I verified that it wasn't the USB cable or my drivers by connecting another phone in diag mode (s3)
Any assistance would be appreciated.
ps I tried the 9090 trick no luck

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