Last night I was looking for a secret code to factory reset my Motorola phone and came across some pretty valuable secret codes for other older Motorola phones which may be helpful to you if you have the following Motorola phones and are still using them. These codes have not been tested by myself, as I obviously do not have all of these phones, but if you are in a jam, its worth a try.

Motorola 920

Press menu and type one of these numbers and press OK:

11 = Status Review
13 = Available Networks
14 = Preferred Networks
22 = Select Keypad Tones
25 = Require SIM Card PIN
26 = Language Selection
32 = Repetitive Timer
33 = Single Alert Timer
34 = Set IN-Call Display
35 = Show Call Timers
36 = Show Call Charges
37 = Call Charge Settings
38 = Reset All Timers
43 = Reset All Timers
45 = Show Last Call
46 = Total For All Calls
47 = Lifetime Timer
51 = Change Unlock Code
52 = Master Reset
53 = Master Clear (Warning!! May result in deleting the Message Editor!!!)
54 = New Security Code
55 = Automatic Lock
63 = Battery Saving Mode

Free call tip

1 Enter the phone number
2 Enter OK
3 Type *#06#
4 Press Button C
5 And finally press the button for power off.

You should now be able to talk without being billed.

The 54# Tip:

Type 1#, 2#........54# on the keypad (when you're not in the menu) to get the phone number used for with this key when speed dialing.

Motorola 930

Press menu and type one of these numbers and press OK:

11 = Status Review
13 = Available Networks
14 = Preferred Networks
22 = Select Keypad Tones
25 = Require SIM Card PIN
26 = Language Selection
32 = Repetitive Timer
33 = Single Alert Timer
34 = Set IN-Call Display
35 = Show Call Timers
36 = Show Call Charges
37 = Call Charge Settings
38 = Reset All Timers
43 = Reset All Timers
45 = Show Last Call
46 = Total For All Calls
47 = Lifetime Timer
51 = Change Unlock Code
52 = Master Reset
53 = Master Clear (Warning!! May result in deleting the Message Editor!!!)
54 = New Security Code
55 = Automatic Lock
63 = Battery Saving Mode

Free call tip

1 Enter the phone number
2 Enter OK
3 Type *#06#
4 Press Button C
5 And finally press the button for power off.

You should now be able to talk without being billed.

Motorola 930

The 54# Tip:
Type 1#, 2#........54# on the keypad (when you're not in the menu) to get the phone number used for with this key when speed dialing.

Motorola 6200

(Note: pause means the * key held in until box appears)

To activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 1 [pause] [ok]
You now have to press the [MENU] and scroll to the 'Eng Field Options' function with the keys, and enable it.

De-activate RBS

To de-activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 0 [pause] [ok]

This only works with some versions of software.

What's the use of RBS:

Get Distance From Base Station - Place a call, when it is answered, press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell', press [OK],
press [MENU] until 'Time Adv xxx' appears, where xxx is a number. Multiply this number by 550, and the result is the distance from the RBS (Radio Base Station), in meters.
Get Signal Quality - press [MENU] until 'Eng Field

Option' is displayed, press [OK], select 'Active Cell',
press [OK], press [MENU] until 'C1' appears. This is the signal quality. If it becomes negative for longer than 5 seconds, a new cell is selected.

Motorola 7500

(Note: pause means the * key held in until box appears)

To activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 1 [pause] [ok]

You now have to press the [MENU] and scroll to the 'Eng Field Options' function with the keys, and enable it.

De-activate RBS

To de-activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 0 [pause] [ok]

This only works with some versions of software.

These countries has been reported working:

IT (model: F16 HW: 5.2 SW: 2.1)

What's the use of RBS:

Get Distance From Base Station - Place a call, when it is answered, press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell', press [OK],

press [MENU] until 'Time Adv xxx' appears, where xxx is a number. Multiply this number by 550, and the result is the distance from the RBS (Radio Base Station), in meters.

Get Signal Quality - press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell',

press [OK], press [MENU] until 'C1' appears. This is the signal quality. If it becomes negative for longer than 5 seconds, a new cell is selected.

Motorola 8200

(Note: pause means the * key held in until box appears)

To activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 1 [pause] [ok]

You now have to press the [MENU] and scroll to the 'Eng Field Options' function with the keys, and enable it.
De-activate RBS
To de-activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 0 [pause] [ok]

This only works with some versions of software.

These countries has been reported working:
ES, AU, NL, BE

What's the use of RBS:

Get Distance From Base Station - Place a call, when itis answered, press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell', press [OK],

press [MENU] until 'Time Adv xxx' appears, where xxx is a number. Multiply this number by 550, and the result is the distance from the RBS (Radio Base Station), in meters.

Get Signal Quality - press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell',

press [OK], press [MENU] until 'C1' appears. This is the signal quality. If it becomes negative for longer than 5 seconds, a new cell is selected.

Motorola 8400
(Note: pause means the * key held in until box appears)

To activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 1 [pause] [ok]

You now have to press the [MENU] and scroll to the 'Eng Field Options' function with the keys, and enable it.

De-activate RBS

To de-activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 0 [pause] [ok]

This only works with some versions of software.

These countries has been reported working:

ES, AU, NL, BE

What's the use of RBS:

Get Distance From Base Station - Place a call, when it is answered, press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell', press [OK],

press [MENU] until 'Time Adv xxx' appears, where xxx is a number. Multiply this number by 550, and the result is the distance from the RBS (Radio Base Station), in meters.

Get Signal Quality - press [MENU] until 'Eng Fiel Option' is displayed, press [OK], select 'Active Cell',press [OK], press [MENU] until 'C1' appears. This is the signal quality. If it becomes negative for longer than 5seconds, a new cell is selected.

Motorola 8700

*#06# for checking the IMEI (International Mobile Equipment Identity)

Activate RBS

(Note: pause means the * key held in until box appears)

To activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 1 [pause] [ok]

You now have to press the [MENU] and scroll to the 'Eng Field Options' function with the keys, and enable it.

De-activate RBS

To de-activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 0 [pause] [ok]

This only works with some versions of software.
These countries has been reported working:

AU, IT, SG, DE, ES, ZA

What's the use of RBS:

Get Distance From Base Station - Place a call, when it is answered, press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell', press [OK],

press [MENU] until 'Time Adv xxx' appears, where xxx is a number. Multiply this number by 550, and the result is the distance from the RBS (Radio Base Station), in meters.

Get Signal Quality - press [MENU] until 'Eng Field

Option' is displayed, press [OK], select 'Active Cell',

press [OK], press [MENU] until 'C1' appears. This is the signal quality. If it becomes negative for longer than 5 seconds, a new cell is selected.

Motorola CD 160

Press menu and type one of these numbers and press OK:

11 = Status Review
13 = Available Networks
14 = Preferred Networks
22 = Select Keypad Tones
25 = Require SIM Card PIN
26 = Language Selection
32 = Repetitive Timer
33 = Single Alert Timer
34 = Set IN-Call Display
35 = Show Call Timers
36 = Show Call Charges
37 = Call Charge Settings
38 = Reset All Timers
43 = Reset All Timers
45 = Show Last Call
46 = Total For All Calls
47 = Lifetime Timer
51 = Change Unlock Code
52 = Master Reset
53 = Master Clear (Warning!! May result in deleting the Message Editor!!!)
54 = New Security Code
55 = Automatic Lock
63 = Battery Saving Mode

Free call tip

1 Enter the phone number

2 Enter OK

3 Type *#06#

4 Press Button C

5 And finally press the button for power off.
You should now be able to talk without being billed.

Motorola CD 520

Press menu and type one of these numbers and press OK:

11 = Status Review
13 = Available Networks
14 = Preferred Networks
22 = Select Keypad Tones
25 = Require SIM Card PIN
26 = Language Selection
32 = Repetitive Timer
33 = Single Alert Timer
34 = Set IN-Call Display
35 = Show Call Timers
36 = Show Call Charges
37 = Call Charge Settings
38 = Reset All Timers
43 = Reset All Timers
45 = Show Last Call
46 = Total For All Calls
47 = Lifetime Timer
51 = Change Unlock Code
52 = Master Reset
53 = Master Clear (Warning!! May result in deleting the Message Editor!!!)
54 = New Security Code
55 = Automatic Lock
63 = Battery Saving Mode

Free call tip
1 Enter the phone number

2 Enter OK

3 Type *#06#

4 Press Button C

5 And finally press the button for power off.
You should now be able to talk without being billed.

Motorola d460

#06# for checking the IMEI (International Mobile Equipment Identity)

Activate RBS

(Note: pause means the * key held in until box appears)

To activate RBS type: [pause] [pause] [pause] 1 1 3 [pause] 1 [pause] [ok]

You now have to press the [MENU] and scroll to the 'Eng Field Options' function with the keys, and enable it.

De-activate RBS

To de-activate RBS type: [pause] [pause] [pause] 1 1 3

[pause] 0 [pause] [ok]

This only works with some versions of software.

What's the use of RBS:

Get Distance From Base Station - Place a call, when it is answered, press [MENU] until 'Eng Field Option' is displayed, press [OK], select 'Active Cell', press [OK],

press [MENU] until 'Time Adv xxx' appears, where xxx is a number. Multiply this number by 550, and the result is the distance from the RBS (Radio Base Station), in meters.

Get Signal Quality - press [MENU] until 'Eng Field

Option' is displayed, press [OK], select 'Active Cell',

press [OK], press [MENU] until 'C1' appears. This is the

signal quality. If it becomes negative for longer than 5 seconds, a new cell is selected.

Motorola V3688

#06# for checking the IMEI (International Mobile Equipment Identity)

Enhanced Full Rate Codec (EFR):

To Enable EFR press [][][] 119 [] 1 [] OK.

To Disable EFR press [][][] 119 [] 0 [] OK

NOTE: Nothing appears on Screen.

Do you have any useful mobile phone tricks you'd like to share? Please do so below in the comments.