There was this particular post that was trending heavily on Social Media, where a particular individual advised that Nigerians should buy credit call cards from individual sellers instead of Banks.

The individual gave a crucial reason that buying from individual sellers means promoting employment and helping sellers eke out living.
This individual is actually right but there are some other things to look at when buying from banks, which include,
1. Banks do not include additional charges when buying a credit call card.
As an example, to buy credit card of a telecommunication network whose brand colour is Yellow, one would need to include an additional 10 naira.
This means when buying a 100 naira call card, one is expected to pay 110 naira to sellers.

2. There is nothing like error in pin.
When call credit card are purchased from Banks, there is no such thing as error in pin.

Unlike buying from sellers, where at times the pin may have been loaded or incorrect.

3. Cashless policy.
Some African countries like Kenya have gone cashless higher than Nigeria.
Buying credit call card from banks is one of the ways we can imbibe the cashless policy in ourselves till we finally go cashless.

4. Technology is growing and there is possibility that it will over ride some other jobs and not just selling of credit call card.

This is one of the impact of technology which has not even hit Nigeria at all.
We are still feeling the lesser part of technology.
Most jobs in advanced country are being over taken by technology.

For example in the next 10 to 15 years, human drivers might be on their way to losing their value because of self driving cars.
However, buying of credit call card from either bank or individual seller is a choice.

5. Limited stress. Banks have made it so easy that all you need to do is to dial some digits on your phone and the credit call card is in.
Do you mind sharing where you buy your credit call card?

From banks or Individual sellers?

https://thrillngr.com/2018/05/04/buying-credit-call-card-individual-sellers-banks/

I prefer sellers

banks charge u if u buy card

a neighbor of mine mistakenly bought a card of 10,000K instead of 1k (biggest disadvantage)

only on Xmas period that card add 10N

I only use bank if I'm in a "no card seller zone"