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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > LG > LG Android based phones

LG Android based phones General LG Android phones discussion, firmwares, solution, root, help

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Old 09-14-2016, 12:33   #1 (permalink)
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Location: US
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LG G4 Us cellular Diag MODE CODE HERE

This is for all the Us cellular Lg G4 users that cannot get the Dm mode enabled with the old code.277634#*#. You need Diag Mode to connect CDMA WORKSHOP and other reader/writer software.
it seems after the update to Lollipop and Marshmallow the code has Changed to enable Hidden Menu and so here is the new Code

The Code is *#546368#*MODELNUMBER#

My model Number on the phone im working with was LGUS991 that is Displayed on the hardware INFO screen in about Phone . USE ONLY THE NUMERIC NUMBER
eXAMPLE *#546368#991#
Your Model may be different .
Once you enter the correct code +model Number go to
SVC Menu
Port Check Test
and enable.
You now have DIAG MODE ENABLED and CDMA will read the Com Port assigned to the phone .

If this Information was Helpful please thank me.
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Old 09-25-2016, 10:49   #2 (permalink)
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Hi, do you by any chance have a TOT file for the US991?
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Old 08-09-2018, 14:09   #3 (permalink)
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i have done all yet com port can't be detected.
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Old 08-12-2018, 02:17   #4 (permalink)
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Originally Posted by master david View Post
i have done all yet com port can't be detected.
After activate diag you need to change to MPT also.
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