Enter the code exactly as shown. Do not press Call — most codes activate automatically.
Hook: Did you know your VIVO X200 Pro has a hidden diagnostic menu, IMEI checker, and testing tools — all accessible through simple number codes? Here’s how to unlock them safely. What Are Secret Codes (USSD & MMI Codes)? Secret codes are numeric strings you dial in the Phone app. They trigger hidden menus for testing hardware, checking device info, or running diagnostics — no root required. Step-by-Step Guide Step 1: Open the Phone dialer app (the same one you use for calls).
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Enter the code exactly as shown. Do not press Call — most codes activate automatically.
Hook: Did you know your VIVO X200 Pro has a hidden diagnostic menu, IMEI checker, and testing tools — all accessible through simple number codes? Here’s how to unlock them safely. What Are Secret Codes (USSD & MMI Codes)? Secret codes are numeric strings you dial in the Phone app. They trigger hidden menus for testing hardware, checking device info, or running diagnostics — no root required. Step-by-Step Guide Step 1: Open the Phone dialer app (the same one you use for calls). How to Use Secret Codes on VIVO X200 Pro