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[Q] How to activate diagnostic mode?

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By alqali, Member on 30th May 2014, 02:27 AM
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Anyone know how to activate the diagnostic mode on the one m8? The old htc one code doesn't work,
 
 
31st May 2014, 10:13 AM |#2  
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*#*#3424#*#*
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1st June 2014, 05:14 AM |#3  
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Quote:
Originally Posted by ashyx

*#*#3424#*#*

That's the previous model's code and does not work on the m8.
1st June 2014, 05:32 PM |#4  
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Quote:
Originally Posted by alqali

That's the previous model's code and does not work on the m8.

looks like someone has slipped an M7 indside my M8 then because it works just fine here!

Last edited by ashyx; 1st June 2014 at 05:43 PM.
1st June 2014, 07:13 PM |#5  
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Originally Posted by ashyx

looks like someone has slipped an M7 indside my M8 then because it works just fine here!

That's strange. I have tried the code on two AT&T models and nothing happens. Which model do you have and can you explain what you did step by step to get it to work. I just entered it in the phone's dial pad and nothing happens.
1st June 2014, 07:17 PM |#6  
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Quote:
Originally Posted by alqali

That's strange. I have tried the code on two AT&T models and nothing happens. Which model do you have and can you explain what you did step by step to get it to work. I just entered it in the phone's dial pad and nothing happens.

It works for me, international version.

Also just put it as shown into the dial pad.

Though you should be abe to see some of the diagnostic tools if you go through the HTC Guide App, IF you have it in your app drawer? Doesn't give ALL of the possible diagnostics but it gives a couple of it.
1st June 2014, 07:24 PM |#7  
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Quote:
Originally Posted by alqali

That's strange. I have tried the code on two AT&T models and nothing happens. Which model do you have and can you explain what you did step by step to get it to work. I just entered it in the phone's dial pad and nothing happens.

International version. Just copied and pasted into the dialler. Have you tried enabling the developer options see if that helps?
Last edited by ashyx; 1st June 2014 at 07:27 PM.
1st June 2014, 07:27 PM |#8  
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Yep, developer's options are on. AT&T most likely removed the function or changed the code
Last edited by alqali; 1st June 2014 at 07:36 PM.
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