Executing these codes is straightforward, but it requires using the native system application. Follow these steps to make them work:
*#*#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.
Major cellular networks (especially contract-based carriers in North America) frequently flash custom firmware onto Samsung devices. These modifications explicitly disable lower-level service menus like *#0011# or *#0808# to prevent users from altering network bands or checking diagnostic details that might conflict with carrier software.
Instantly displays your phone's IMEI and Serial Number, which are essential if your phone is lost or for warranty verification.
The code *#*#4636#*#* (Phone Information) works on many Androids but is dead on the Galaxy A7 after One UI 1.5. Use *#0011# instead.