Here is a helpful list of universal cell phone codes that work across many networks and devices. Note: Some may not function on every carrier or handset.
Basic Information Codes:
*#06# – Display your IMEI number.
*#*#4636#*#* – Android only: Opens the “Testing” menu to view usage and battery info.
*#0*# – Opens the general test overseas chinese in europe data mode (Samsung-specific).
Network and Call Settings:
*#21# – Check if call forwarding is enabled.
*#62# – View call forwarding for unreachable numbers.
*67[number]# – Temporarily block caller ID when calling.
*31# – Toggle caller ID visibility (some carriers only).
Balance & Data (Carrier-specific examples):
*777# – Verizon prepaid balance check.
*3282# or #DATA# – AT&T data usage.
*225# or #BAL# – AT&T balance.
Call Forwarding/Divert:
**21*[number]# – Forward all calls.
**62*[number]# – Forward calls when unreachable.
##21# – Deactivate all call forwarding.
Always double-check with your provider if these codes are supported, as some carriers use proprietary versions.
How to Use Cell Phone Codes Safely
While most cell phone codes are harmless and highly useful, it’s important to use them responsibly. Some engineering or diagnostic codes can access sensitive system functions that may impact your phone’s performance if misused. Here are a few safety tips:
Use Verified Codes Only: Only use codes from trusted sources or your mobile provider’s official support documentation.
Avoid Advanced Engineering Codes Unless Necessary: Codes that open hidden menus or firmware testing are meant for technicians. Use them with caution.
Check Device Compatibility: Not all codes work across every phone model or OS. A code that works on Android may not work on iPhones.
No Root Required (Usually): Most user-facing USSD and MMI codes don’t require root access and won’t void warranties.
Be Mindful of Billing or Settings Changes: Some codes may activate or disable services that could affect your billing, such as call forwarding or data roaming.
Using these codes wisely can make managing your phone more efficient and give you access to tools that many users overlook.