Type exactly: *#9990* or *247* ( Note: Not all T528 models support this; try both codes ).

Press and hold Volume Up + End/Power button simultaneously. On some T528 variants, use Volume Down + Power button. Try both if one doesn't work.

The phone will restart. First boot takes a bit longer (up to 2 minutes). Your TECNO T528 is now reset. Method 3: Hard Reset via Secret Code (If Keypad Works) Some T528 models respond to a USSD code for factory reset. This works if the phone can still make calls but is otherwise glitchy.

Ensure the phone is powered off . If the phone is frozen or unresponsive, remove the battery for 10 seconds, reinsert it, but do not turn the phone on.