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Here I have iPhone XR and let me show you secret codes for the following device
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At the very beginning let's open the home screen file and select the phone's dialer
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let's activate the keypad and let's start with the first secret code
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So at the very beginning let me open the field mode so we need to use the asterisk 3001 pound
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one two three four five pound asterisk and let's use the green icon this is the main
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menu of the field mode here you can see the device info for example the sim files right
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here you can also go back and you can choose the LTE information such as for example serving
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so info you can also here open the UMTS and the GSM
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So that's it let's go back let's quit the field mode and it's time to enter the second
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secret code so let's check out the settings for transferring the phone calls fax etc
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Let's use the asterisk pound 21 pound let's use the green icon that's it here we've got
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this menu so let me tap dismiss now let's check out the information regarding the current
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status of the presentation of number and making phone calls let's just use the asterisk pound
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pound the green icon here we've got the information tap dismiss now you can also
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see the block phone information by using the following secret code asterisk pound three
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pound let's use the green icon that's it you may also open the settings for awaiting calls
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by using the asterisk pound three four three pound green icon you can check out the number
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which you would like to transfer calls by using the asterisk pound six one pound
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all right you can also check out another secret menu for transferring calls let's
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use the asterisk pound six two pound and you can check out the menu to show all numbers to
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which you would like to transfer calls when your device is currently busy by using this
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code you can answer you can access this menu asterisk pound six seven pound and the phone
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icon that's it and at the end let me show you the email mode by using the asterisk pound zero
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six pound and the email information pops up all right so that's it everything went well
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