| Purpose | Code | |--------|------| | General Test Menu (screen, sound, sensor, etc.) | *#0*# | | Battery & Statistics | *#0228# | | View IMEI Number | *#06# | | Service Mode (advanced network info) | *#0011# | | Software & Hardware Info | *#12580*369# | | Camera Firmware / Test | *#34971539# | | Proximity Sensor Test | *#0588# | | Touchscreen Test | *#2663# |

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.

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:

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.

If you own a Samsung Galaxy A7 (2nd generation)—often referred to as the Samsung Galaxy A7 (2018) or the SM-A750F/DS—you are holding a device packed with hidden potential. Beneath the sleek One UI interface lies a powerful diagnostic toolset accessible only through "secret codes."

These codes (also known as USSD codes or MMI codes) allow you to test hardware components, retrieve hidden network information, run instant diagnostics, and perform master resets. However, many users report that "codes don't work" on their Galaxy A7. Why? Because Android manufacturers and carriers frequently block certain codes for security reasons.

In this guide, we will walk you through exactly how to use secret codes on the Samsung Galaxy A7, which codes are confirmed to work, and what to do when a code fails.

The Samsung Galaxy A7 (2018) is a capable mid-range device known for its triple-camera setup and Super AMOLED display. However, beneath the standard One UI or Samsung Experience interface lies a hidden layer of software known as "Service Mode." This hidden layer is accessed via secret codes (also known as USSD codes or dialer codes).

Whether you are a technician troubleshooting a device or a power user wanting to verify hardware integrity, these codes provide shortcuts to vital diagnostic tools.

Note: Please proceed with caution. Some codes access settings that can alter system behavior or delete data (like a factory reset). It is recommended to back up your data before experimenting.

Code: *#*#7780#*#* or *#27663368378# (depends on firmware)
Action: Resets the phone to factory settings.
Critical warning: This deletes all your data (apps, accounts, settings). No confirmation beyond a single pop-up on some variants. Back up everything first.
Note: On many Galaxy A7 units with Android 9+, this code is disabled. Use the Settings menu instead for safety.