| Dial Keys | Details | Specifics |
| *#*#4636#* | To know phone with network details | |
| *#*#3264#*#* | To know about RAM Version of the mobile | |
| *#*#2664#*#* | To test the touchscreen | |
| *#07# | To check mobile radiation level(SAR value) | Optimum<=1.6 |
|
*#62# or *#21# |
To check mobile is abnormally activated or not for each mobile number | |
| *#002# | To remove any mobile abnormal activation | |
| *#06 | To check Serial number of a mobile | |
| *#06# | To check IEMI/Serial number of a mobile | |
| *#0*# | To check proper hardware functioning of a mobile(Test mode) | for Samsung phone mainly |
| dial *401* and then just type your forwarded mobile no. | To activate call forwarding in a jio mobile number | |
| dial *402* only. | To de-activate call forwarding facility in a jio mobile number | |
| *#*#4636#*#* | To know about mobile details & its battery use | |
| *43# | To activate call waiting | |
| #31# | To disable/enable to display phone number in outgoing call. | |
| *33*# | To stop outgoing calls | |
| *#30# | for number identification | |
| *#*#7780#*#* | for factory setting | |
| *#*#225#*#* | For Calendar info | |
| *#*#426#*#* | For Server Event info | |
| *#*#372733#*#* | for SW & HW Version Test |
** NB : Some specific company of mobile may not use this secret code properly.
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