Long expiry plans look cheaper per month than short ones, but only because the provider is selling time you will not necessarily use. The trap is dividing the recharge by the number of calendar months and treating the result as a monthly price.
Why the arithmetic does not land on a month
A 186 day term is roughly six months and a half, not six. Divide the recharge by six and you understate the true cost; divide by 7 and you overstate it. Neither figure is what you pay in any given month, because you pay once for the whole block.
What the long-expiry recharges actually contain
| Recharge | Data | Expiry |
|---|---|---|
| $80 | 30GB | 186 days |
| $90 | 50GB | 186 days |
Those are the 186 day columns from the provider tables. Notice the pairing: more money does not buy proportionally more data. The $80 recharge gives 30GB and the $90 gives 50GB, so the step up is worth taking only if you would otherwise buy two shorter recharges.
What you give up for the longer term
The commitment is the whole recharge. If you need to leave before the term ends, the provider states what happens to the service and the balance; there is no monthly exit on a prepaid recharge.
What we could not verify. Where a provider has not published a figure we mark it unknown rather than estimate it. Re-read the provider page linked below on the day you decide.