If you are considering 1O1O because your csl reception is poor, first ask whether the proposed plan would change anything at that location. Both are CSL Mobile brands. A different logo is not evidence of a different radio network or better indoor signal; plan speed limits and allowances can still differ. CSL’s service terms cover both brands.
The 1O1O bill, with the administration fee included
1O1O’s published 5G Prestige page lists these standard 24-month plans for new or renewing customers. Handset-voucher offers on the same page can have different commitments. The table excludes optional add-ons.
| Monthly local data | Bill including HK$18 administration | After the allowance |
|---|---|---|
| 30GB | HK$299 + HK$18 = HK$317 | 1Mbps |
| 60GB | HK$389 + HK$18 = HK$407 | 1Mbps |
| 100GB | HK$419 + HK$18 = HK$437 | 2Mbps |
The 30GB plan therefore costs HK$7,608 over 24 full billing months. Put your written csl quote beside that total, including its administration fee and compulsory extras. A csl banner or a retention offer for another account does not establish the price you can obtain.
A family plan needs household arithmetic
Eligible 1O1O plans of 60GB or above allow additional SIMs sharing the main local-data allowance. The first and second SIM cost HK$120 and HK$100 per month. With the 60GB main line, that gives a published-fee subtotal of HK$627 for three lines, or HK$209 per line. Ask for the final household bill, including any further charges, before treating that as an all-in quote.
That is 60GB across three people, not 60GB each. Add up the household’s last three monthly usage figures before deciding. Also record each SIM’s end date: the additional-line terms link service to the primary plan and impose their own commitment. Moving one family member later can be less straightforward than keeping separate contracts.
Put a cash limit on benefits
- If 1O1O costs HK$80 more per month than your usable alternative, the extra is HK$1,920 over 24 months. List the services you would actually pay that amount to receive.
- A handset voucher saves money only when its eligible handset price, redemption deadline and required plan beat buying the same phone separately. Compare the final phone-and-service total.
- If you mainly use Wi-Fi and want one inexpensive line, start with the smallest suitable data allowance. Unused data and unredeemed benefits do not recover a higher bill.
