T205/T19x
*#06# -> Displays imei
*#300# OK
-> List the Software
& Hardware Version
*#301# OK -> Full
Keypads Functional Test
*#303# Ok -> Set Default Language to
English
*304# OK -> Set OFF engineering mode
#304*19980722# -> Set
ON Engineering mode
*#305# OK -> Location: 1 OK
*#307# OK ->
Engineering Test Mode
*#311# OK -> Phone code changed to default
code
*#400# OK -> ADC, Cal val*
*#402# OK -> Adjust Display
Intensity/Contrast
*#403# OK -> List the manufacturing
Informations
19980722 OK -> Master Unlock code for Phone & Sim Lock
*#302# OK ->
Acoustic Test*
*3370# -> Enhanced Full Rate
#3370# -> Deactivate
Enhanced full Rate
*#72837726# OK -> Confirm?, Data Saved
1234 OK Phone
Code Default
*#0000# OK -> Settings saved, restore set phone to default language
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