Can you elaborate how did that work? I never heard about this method
Can you elaborate how did that work? I never heard about this method
So firms would advertize a missed call number on the radio.
People could give that number a missed call, and they would soon get a call back from the firm - thus never spending any money at all.
The more common interpersonal example was one person having more money than the other, or being on a company plan - so they would get missed calls from their family/friends, and they would then call back.
The cost was thus borne by the firm/richer person/person with more talk time.
Actual Example from my life: My dad had a cellular plan that had lots of free minutes of calling. So, I would just give him a missed call and he would call back. This was the early 2000s I think.
[1] https://academic.oup.com/jcmc/article-pdf/13/1/1/22316427/jj...