This isn't necessarily true in all cases - I can cite you an opposite example. Pre-covid, I was in Singapore. You pay $10 SGD for 1GB of data ONLY (no calls included). The top network operator in Singapore is state-backed Singtel.
Their network coverage is very poor in many areas within the city. Singapore is almost literally just one big city and yet, the 4G experience is extremely poor.
Also, customer support is very difficult to get hold of, if you're on the prepaid plan. I almost found it a rip off to pay so much for 1GB of 4G data for such a crappy experience.
Now, after my trip, I went to India. I paid $10 for 1.5GB of data DAILY from Airtel (India's top provider) which also includes free unlimited calls. The experience isn't uniform (India is quite huge in comparison to Singapore) but within any tier A city, Airtel is MUCH better than Singtel. Also, the customer support is top notch for the peanuts you pay them and you can find an operator to talk to in usually a minute or less. For comparison, in Singtel, you would have to navigate the crazyily designed IVR and wait for atleast 5+ minutes before you can talk to a real person.
I'm just citing this example to prove that the most expensive 1GB isn't necessarily the best.
Now, after my trip, I went to India. I paid $10 for 1.5GB of data DAILY from Airtel (India's top provider) which also includes free unlimited calls. The experience isn't uniform (India is quite huge in comparison to Singapore) but within any tier A city, Airtel is MUCH better than Singtel. Also, the customer support is top notch for the peanuts you pay them and you can find an operator to talk to in usually a minute or less. For comparison, in Singtel, you would have to navigate the crazyily designed IVR and wait for atleast 5+ minutes before you can talk to a real person.
I'm just citing this example to prove that the most expensive 1GB isn't necessarily the best.