Service Menu

This code is found while attempting to unlock the phone; it doesn't work past the first set of numbers for me at least.  Use this information at your own risk!!!
Note:
- Warning: Step 1 is the hard reset code (a.k.a. Master Reset to Factory settings)!!!  Anything unsaved to memory card/added by the "Master Key" > TKFE process will be deleted; i.e. games & apps.  Also, unsaved notes, wallpaper photos, and anything added to the Impression will be removed.  The only exception I found is texts stored on the phone should be safe (however, I only had under 20 in the Inbox and 12 in the Sent box).

Here are the steps:
1.) Dialpad *2767*3855#
(Suppossively remove & reinsert the SIM card without taking out battery before phone restarts)
2.) Dialpad *7465625*638*00000000*00000000#
3.) Dialpad  #7465625*638*00000000#
Steps 2 & 3 numbers may be invalid.  Maybe I didn't take the SIM card out, as it seemed to respond to Steps 2 & 3 only once.  However, it does not brick the device.

Second is a way to alter the internal settings.  Do not change things you are unsure of!!!  I did once, and I didn't get AT&T service for my device.  I accessed it again, changed a few things, and it was stuck on the "Goodbye" screen.  I removed/reinserted the battery, and the phone now operates (at least sends out a text and voice calls).  I'm unsure if the changes I made took effect, or removing the battery canceled them.  Anyway, here is the sequence to type: Dialpad *2767*2878#

If anyone has more codes to add, be my guest!  Remember, this may not be under warranty, so do so at your own risk!

I understand that you just got out of the hospital and are still groggy, so I'll go easy on you.

The first set of codes is used to unlock the phone, whereas it can be used with a SIM card from T-mobile or any other GSM network in the world.  That is why the start-up says it is a "World Phone".    From what I have read, this process does not brick any phone.  Personally, I have used this series of codes 5 times and my Impression still works flawlessly.

The second code [ Dialpad *2767*2878# ] is where someone needs to know the technicality/specifics of a phone's make-up.  It should only be altered by experts.  From memory, I recall there is a sound decibels settings, GSM network test, and many other technical settings.  This is the code where changing settings could brick the Impression.  

The point of the thread was to have experts who know mobile settings to tweak things and hopefully figure out how to correct the phone issues, such as the delayed qwerty keyboard and the infamous text bug.

P.S.  "Step 1" is the only code to Hard Reset the Impression.

And as I said what does the master reset step have anything to do with unlocking the phone? And what does unlocking the phone have to do with the title about accessing the internals.

It is I am that am going easy on you right now. The post is a mess. Gives no tutorial. Bunches a few codes together that have nothing to do with each other nor the title. You even stated that you messed up your phone because of it.

So again I ask what is the point of this thread.. To unlock your phone, master reset, or your other code that claims to enter the settings somehow but only gives me bad command? Except I know that if you hit back this is actually a back door into the service menu which is nothing new. There are a few. I prefer the front door. *#197328640#  This is not the internals.

This is what I was referring to, with the second code.  I only went one level deep into it.  I did not change anything though.  Here's the menu I found and wrote by hand:
*2767*2878#
>    “Press Back Key
      or # Key
   TMCommand:219”
(“Back Key” pressed) >
   [1] Read IMEI
   [2] Read SW VER   
   [3] Read Tune VER   
   [4] Read FTA SE VER
   [5] Read ALL VER
(“1” pressed, then “Back Key”)
   [1] IMEI, SW_VER
   [2] HW_VER, Rf_Cal_date
   [3] Bluetooth Information
   [4] Charging Temperature
   [5] Proximity Sensor
   [7] Acceleration Sensor
(“5” pressed)
   [1] Detect Poll Time = [500]
   [2] PWM Frequency = [10000]
   [3] PWM Burst Count = [20]
   [4] PWM Duty Cycle = [50]
   [5] Detect ADC Threshold = [76]
(“Back Key” pressed)
   [1] Debug Screen
      [1] Idle Mode Information
      [2] UE Capability Information
      [3] Access Stratum Information
      [4] NAS Information
      [5] NeighborCell Information
      [6] Reselection Information
      [7] SIM Information
      [8] Phone control
      [9] Antenna Test (Setup/View)
   [2] Version Information
      [1] IMEI, SW_VER
      [2] HW_VER, Rf_Cal_date
      [3] Bluetooth Information
      [4] Charging Temperature
      [5] Proximity Sensor
      [6] Write gsm rf nv
      [7] Acceleration Sensor
   [3] RF Test
      [1] umts tx test
      [2] umts rx test
      [3] gsm test
      [4] bluetooth test
      [5] nv restore
      [6] nv backup
      [7] nv remove
      [8] rf information
      [9] rfnv retrieve flag
   [4] UMTS rf nv
      [1] umts rf nv read
      [2] umts rf nv write
      [3] single freq enable
   [5] Read gsm rf nv
      [1] Read gsm rampon 0~8
      [2] Read gsm rampon 9~14
      [3] Read gsm rampoff 0~8
      [4] Read gsm rampoff 9~14
      [5] Read dcs rampon 0~8
      [6] Read dcs rampon 9~15
      [7] Read dcs rampoff 0~8
      [8] Read dcs rampoff 9~15
      [9] Read rx gain range
   [6] Write gsm rf nv
      [1] W gsm rampon 0~8
      [2] W gsm rampon 9~14
      [3] W gsm rampoff 0~8
      [4] W gsm rampoff 9~14
      [5] W dcs rampon 0~8
      [6] W dcs rampon 9~15
      [7] W dcs rampoff 0~8
      [8] W dcs rampoff 9~15
      [9] W rx gain range
   [7] Base Band
      [1] Vibration Test
      [2] Backlight Test
      [3] FrontLcd Test
      [4] KeyLed Test
      [5] CamFlashLed Test
      [8] TocuchPointDisplay
   [8] Audio
      [1] RCV Config
      [2] EAR Config
      [3] SPK Config
      [4] BTH Config
      [5] Common Config
      [6] Rebuild
   [9] Common
      [1] Batt, Temp
      [2] FTM NV read
      [3] FTM NV set
      [4] FTM NV unset
      [5] Version Info
      [6] USB Configuration
      [7] UART Configuration
      [8] Power on info
      [9] Camera Tuning [OFF]

OK I changed the title.  The Service Menu is a new discovery to me is my point; I thought it was something unexplored. 

If the thread will be used to explain what each option does, that would be great.  However, if you insist that I delete this thread, I will.