The most powerful secret code on the Galaxy A7 is *#0011#. Once inside, you can access deeper menus:
Band Selection lets you force your phone to use 4G LTE bands only (useful if you’re in a weak signal area). But be careful—changing the wrong setting can break cellular connectivity until a factory reset.
Maya loved tinkering with her old Samsung Galaxy A7 (2016). One rainy afternoon she sat at her kitchen table, determined to learn a little more about the phone’s hidden features. She wasn’t after anything risky — just practical checks and quick shortcuts to make life easier.
She started by unlocking her phone and opening the dialer. Remembering a tip from a forum, she carefully typed *#06# to reveal the IMEI number. It appeared instantly; she photographed it and stored the image in a secure notes app for when she needed it for warranty or carrier support.
Next, Maya entered #0# out of curiosity. The phone jumped to a diagnostic menu with tiles for testing the screen, camera, sensors, and touch input. She tapped each one: the red, green, blue screen tests confirmed there was no dead pixel; the touch test showed smooth response across the display. Satisfied, she exited by pressing Back. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work
Maya then tried *#1234# to check her firmware version — useful before attempting an over-the-air update. She noted the build number and cross-checked it against Samsung’s support page later that day.
Thinking about battery life, she explored *#0228# which showed battery status and voltage. It wasn’t a replacement for a proper battery health app, but it gave her quick voltage info. For a deeper look at network connections, she used *#0011# to view service mode details — helpful when troubleshooting flaky mobile data.
Maya knew there were boundaries: some codes could factory reset the device or perform low-level changes. She avoided any codes that included words like “erase,” “wipe,” or “factory” unless she had a full backup. Before trying anything unfamiliar, she bookmarked a reputable support page and backed up photos, contacts, and app data to a secure cloud.
That evening she organized what she’d learned into a short list on her phone: The most powerful secret code on the Galaxy A7 is *#0011#
Maya felt empowered. The secret codes weren’t magic — just shortcuts that, used carefully, saved time and helped her troubleshoot. She made one rule: always back up first, and never input codes sent by strangers.
If you try these, treat them as quick tools: check IMEI, run diagnostics, review firmware and battery info, but avoid codes that alter or reset the phone unless you’re prepared.
Note: Newer Samsung Galaxy A series phones (2020+) still support many of these codes, but some may not work depending on your carrier or Android version.
Code: *#0588#
Action: Immediately tests the proximity sensor (used for turning off the screen during calls).
Result: Cover the top front of the phone with your hand. The screen should say "PASS" or "PROXIMITY – ON." Band Selection lets you force your phone to
Secret codes can give you quick access to hidden menus, testing features, and device info. Here's how to use them:
Using these codes is simple and does not require any third-party applications.
If you’ve typed a code from the working list above and nothing happens, try this:
If you need to know technical details about your specific unit without digging through settings menus.
Code: *#0808#
Action: Opens USB settings (not a test per se but allows you to switch between MTP, ADB, and charging modes).
Warning: Do not change these settings unless you know exactly what you are doing—you could disable file transfer.