How-to: unlock Lonsdor FT series Toyota/Lexus smart keys manually without other device.
Step 1: Press and hold button 1,2,and 3 at the same time (the order marked above)
Step 2: After the indicator light is on, keep button 1 and 2 still and release button 3.
After the indicator light goes off, press button 3 again.
Step 3: Repeat Step 2 ten times until the indicator light flashes continuously, then release all 3 buttons. After the indicator light stops flashing, the FT key is unlocked successfully.
Check video guide as well: