You do not have to buy a product labelled “data-only” to use mobile data on a tablet or hotspot. A local prepaid phone SIM can be an option if the carrier permits that device and tethering. Conversely, a data-only travel eSIM may have no usable phone number or SMS service. Start with the device and the job.
Short bursts of use: buy for the actual period
SoSIM’s renewal tariff lists HK$48 for 30 days with a 60GB fair-use allowance. For a temporary connection, compare that one payment with a higher monthly plan you would keep paying between uses. Confirm permitted hotspot/device use and the post-allowance speed before relying on it for work.
Low use spread over a long time
LuckySIM’s HK$138 three-year pack includes 30GB over the whole 1,095-day term, not 30GB each month. Divide 30GB by 36 months and the average is only about 0.83GB a month. That may fit occasional backup checks; a single large software update could consume much of the pool. Unused data after expiry is not a saving.
Check hardware before paying
- An eSIM-compatible phone does not prove your tablet or router supports the same installation method. Check the exact regional model and any carrier lock.
- Some accounts need an SMS for login or top-up. Work out how to read it if the SIM sits in a router, and retain the carrier account credentials.
- Set the APN from the carrier’s instructions and test with the intended device. Do not assume a successful phone test proves router support.
Avoid renewing a backup you no longer need
Record the data-pack expiry, SIM/account expiry and auto-renew setting separately. Schedule a small connection test before the account expires, and check whether that activity actually extends validity; often it does not. If the backup is for broadband outages, keep a second way to access the renewal account when home Wi-Fi is down.