Mark All Messages as Read
When unread badges pile up across several conversations in the Messages app, tapping into each thread just to clear the counter gets tedious fast. On MIUI there is a faster way to clear every unread marker at once, without opening every single chat.
Turn On/Off Dial Pad Tones
Every digit you tap on the Xiaomi phone app's dial pad triggers a short beep, and that tone lives in a settings menu that has nothing to do with the calling app itself. In quiet places or shared rooms, that repeated clicking sound gets annoying fast, especially if you dial full numbers manually. Other users want the opposite problem solved: the tone stopped playing and they miss the tactile feedback while typing a number.
Make a Phone Call
When two SIM cards are active on your Xiaomi phone, tapping the call button can leave you unsure which line actually dials. The Phone app splits the green call button into two halves, one per SIM, and tapping the wrong side sends the call out on the wrong number or tariff. This mix-up gets worse if the SIM slots have not been renamed, since both halves look nearly identical.
Forward an SMS Message
Need to pass on an address, code, or phone number from a text without retyping it? On Xiaomi phones you can forward the original SMS straight from the Messages app instead of copying the content by hand. This saves time and avoids typos in important details.
Set Up Fixed Dialing Numbers (FDN)
If your Xiaomi phone suddenly refuses to dial certain numbers, Fixed Dialing Numbers might be limiting outgoing calls and texts to a preset list. This SIM-level restriction blocks any number that is not on the approved list, even a local number with the right area code. Turning the feature on or off always requires PIN 2, not the regular SIM PIN, which trips up most people who try it for the first time.