How can you make a call without Airtime on Airtel? You may ask.
Now this is where this Airtel tweak comes in. This may sound ridiculous but its just one of the many unknown tweaks I have tested and it really works. So if you have an Airtel SIM and need to make an emergency call (more like flashing), this is for you.

You should note that this Airtel tweak isn’t to make calls for a period of time. It is more like calling a number when you’re stranded or without airtime. So seeing your missed call, the person can call you back.

Although, if you have airtime you can also make this call as well on your Airtel SIM. So, let’s get down to how its done.

Unfortunately for users of other mobile operators, this tweak is only available for AIRTEL USERS ONLY.

Its quite simple, pick up your phone with your Airtel SIM card in it and dial **number. For example **07057053958. This will ring once and the receiver will get a missed call signalling that you called.

Source:
https://wongacity.com/make-call-without-airtime/

Which one con be all the English