If you’ve ever wondered whether there are hidden tricks to boost your iPhone experience, the answer is yes—and they’re called iPhone codes.
These secret dialer codes, also known as USSD or MMI codes, give you access to features Apple doesn’t advertise publicly.
Whether you want to view hidden settings, test hardware, or access quick diagnostics, knowing these codes puts more control in your hands.
We’ve already explored some cool things you can do on an iPhone, but this guide focuses specifically on dialer codes that unlock hidden features instantly.
What Are iPhone Dialer Codes?
iPhone codes are special sequences of numbers and symbols that you enter into your phone’s dialer. Once dialed, they trigger hidden menus or diagnostics that help you view details or modify certain settings.
These codes aren’t unique to iPhones—they’re also used across Android and other mobile devices. However, the iPhone handles some of them differently due to iOS restrictions.
Interestingly, many of these codes are based on GSM (Global System for Mobile Communications) protocols, which explains why some work better on specific networks.
Essential iPhone Codes and What They Do
Below is a table highlighting some of the most useful iPhone codes, along with their functions.
| iPhone Code | Function |
|---|---|
| *#06# | Displays your device’s IMEI number |
| *#21# | Checks if call forwarding is enabled |
| *#62# | Shows the number your calls are forwarded to when unreachable |
| *#67# | Displays the number your calls are forwarded to when busy |
| *#31# | Hides or shows your caller ID |
| 3001#12345# | Opens Field Test Mode for network diagnostics |
| #50057672# | Shows your SMS message center number |
| *#33# | Checks whether outbound services like calls and data are restricted |
These codes are quick to enter and don’t require any additional apps. Just open the Phone app, type the code, and press the call button.
How to Use These Codes Safely
Before using these iPhone codes, it’s important to understand their impact. While many codes only show information, others might modify network or device behavior. Here are a few safety tips:
- Always double-check what the code does before executing.
- Avoid sharing sensitive outputs like your IMEI online.
- Test codes like 3001#12345# in areas with good reception to avoid data disruption.
If you’re interested in more facts about your device, check out our breakdown on 5 facts about iPhones that most users overlook.
Advanced Diagnostic Options
For those who want deeper insights, Field Test Mode is a goldmine. By dialing 3001#12345#, you can view real-time signal strength in decibels, cell tower info, and LTE parameters. This mode is especially helpful when troubleshooting connectivity issues.
Here’s a quick breakdown:
| Feature in Field Test Mode | What It Shows |
|---|---|
| Serving Cell Measurements | Signal strength, tower IDs |
| LTE Neighbor Info | Info about nearby cell towers |
| Device Info | Hardware stats like modem firmware |
This level of detail is usually hidden from regular users but can be incredibly useful when diagnosing network problems or choosing the best mobile provider in your area.
Limitations and Compatibility
Not all iPhone codes work on every carrier or iOS version. For example, CDMA-based networks may not support some GSM-based codes. Moreover, newer iOS updates occasionally restrict access to certain features for privacy and security reasons.
To make the most of these codes:
- Test them after major iOS updates.
- Consult your carrier if a code doesn’t respond.
- Bookmark this guide for quick reference in the future.
Final Thoughts
Mastering these iPhone codes is like unlocking a second layer of your smartphone. You get diagnostic power, faster access to hidden menus, and a better understanding of how your device operates.
Combine this with the tips from our iPhone tricks guide and you’ll be using your device like a tech pro in no time.
And if you’re curious about how iPhones evolved to offer such capabilities, this history of the iPhone provides fascinating insights into Apple’s journey.
Stay tuned for more guides that dig deep into your tech—because knowledge is power, and you’re just a few codes away from mastering your iPhone.
