Answer
If you need a large volume of mobile internet, a contract plan may be easier to understand: a range of USD 20–30 per month for 70 GB was cited. Without a contract, a benchmark of about USD 5 per month was cited, but it is not equivalent in data allowance.
Comparing these two scenarios is not just about price. What matters is the gigabytes included, the commitment period, coverage in your area, the ability to top up and how regularly you use mobile internet outside your home.
For occasional use, a no-contract option can be cheaper because there is no fixed large payment. For active work from a phone, tethering, or frequent travel, a contract package with a large data allowance is usually easier to plan into a monthly budget.