score:4
The Wikia webpage on prepaid mobile options in Hungary seems to point to the fact that, to date, the Go Napinet Netplusz L package from Magyar Telekom (formerly T-Mobile) for 1GB of data seems to be the cheapest option. Indeed, comparing data only-sims with similar data allowances yields the following ordered list (ordered from cheapest to most expensive):
HUF for 1GB (valid for 30 days)Yields a minimum spend of 600HUF + 1,290HUF = 1,890HUF
HUF including a 1GB weekly ticket worth of 2,490HUFHUF for 1GB (valid for 1 week)Yields a minimum spend of 2,490HUF for 1GB of internet to be used in a week.
HUF with a balance of 3,000 HUF valid for 180 daysHUF for 1GB (valid for 45 days) Yields a minimum spend of 3,990HUF (since you'll have just enough credit included in the starter pack to purchase the data bundle).