How to unlock permanently locked tecno phone?

I am kindly trying to know on how to unlock my phone, because it has been locked since last year 

...Is it just locked or permanently locked?...please be specific ... make a difference but a Permanently locked phone sure needs more eyes than ... with a solution for Permanent locks(hard lock) if that's your ...  

You should try resetting the phone to its factory state using ... + Camera Button. The SIM is locked because it cannot establish the ...