Hong Kong 50GB 30 days
csl / SmarTone
- Data
- 50GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$26.90$25.55
CSL / HKT and travel eSIM in Hong Kong
CSL / HKT is one of the networks your eSIM may use in Hong Kong. Here is who actually decides which network you get, and what to do with that.
Author: Porsch Kunnipat Siramanakul · Co-founderReviewed by: Bob Kanokphon ThongdeePublished: October 12, 2026Last updated: October 12, 2026
Quick answer
- 68 of the 93 Hong Kong plans we sell name CSL / HKT as a reachable network, at 4G and 5G.
- csl runs LTE on B1, B3, B5, B7 and 5G on n1, n78, n79; your phone needs at least one of them.
- Travel plans connect by roaming, so no plan can promise one specific network.
CSL / HKT in brief
csl says its 5G uses dedicated 3.3, 3.5 and 4.9 GHz spectrum (plus 700 MHz and 26/28 GHz holdings), so it needs no dynamic spectrum sharing with 4G.
We are not a reseller for this operator and we have not run our own field speed tests. The band and network details below come from the sources listed at the end of the page.
csl's bands and technology
| Item | csl |
|---|---|
| LTE (4G) | B1, B3, B5, B7 |
| 5G NR | n1, n78, n79 |
| 5G launched | Live |
| Network code (MCC-MNC) | 454-00 |
Checked against the sources on 2026-10-12. Only the bands a source confirmed are listed; the network may run others too.
An eSIM can only use csl if your phone supports at least one band in this table. Before you fly, open your model's spec page on the maker's site and compare its LTE and 5G band lists.
csl's coverage map
csl publishes its own coverage map. Look up the street or district you will stay in rather than the country as a whole, because coverage in town and out of town differs a great deal. The map shows csl's own network; a roaming plan may not get every technology it shows.
Who licenses csl
Mobile networks in Hong Kong are licensed, and their spectrum assigned, by the Office of the Communications Authority (OFCA). The bands above are the ones it allocates. A problem with the local network's own service goes to the operator first; a problem with your eSIM plan comes to us.
The plans on our shelf that name CSL / HKT
From the supplier record behind each package, 68 of the 93 plans we currently sell for Hong Kong declare CSL / HKT as a network the profile can reach, at 4G and 5G. The figure comes from the same catalogue that prices the plan pages, and it moves when the supplier revises the record.
A plan naming CSL / HKT means the network sits in the list the profile may choose from. It does not mean your handset will stay on it. The priority order is the supplier's, and the signal where you stand decides.
csl beside the other networks in Hong Kong
| Network | LTE bands | 5G bands |
|---|---|---|
| CSL / HKT | B1, B3, B5, B7 | n1, n78, n79 |
| SmarTone | B1, B3, B5, B8 | n5, n78, n79 |
A band shared across networks is one a single phone can use on all of them.
Why plans do not name a fixed network
Nearly every travel eSIM is a roaming product: the profile picks a network by an order the supplier sets, not by the buyer. If CSL / HKT is weak where you are, try selecting China Mobile Hong Kong or SmarTone manually in the network settings, and keep data roaming on for the eSIM profile.
FAQ
Will my eSIM definitely connect to CSL / HKT?+
68 of our plans name CSL / HKT as reachable, but that is not a guarantee. Travel plans run over roaming agreements, so the network depends on the supplier behind the plan, your device and where you are.
Which bands does my phone need for csl?+
At least one of these, LTE: B1, B3, B5, B7; 5G: n1, n78, n79. Your phone's band list is on the maker's spec page for your model, under "Cellular" or "Network".
Does CSL / HKT run 5G, and will my plan get it?+
Yes. csl has run commercial 5G, on n1, n78, n79. A travel plan only gets it when the plan permits 5G, your phone supports one of those bands, and you are inside 5G coverage. Miss any one and you fall back to 4G.
How do I see which network I am on?+
Check the carrier name at the top of the screen, or open the mobile-network settings and look at the operator list. If signal is poor, try selecting a network manually instead of automatic, but only one your plan actually supports.
Sources
- operator site — csl, October 11, 2026
- List of LTE networks in Asia — Wikipedia, October 11, 2026
- List of 5G NR networks — Wikipedia, October 11, 2026
- csl 5G network — csl (HKT), October 12, 2026
- Mobile network codes in ITU region 4xx (Asia) — Wikipedia, October 12, 2026
- OFCA — OFCA, October 11, 2026
About the author
Porsch Kunnipat Siramanakul
- Co-founder of eSIMonline.asia
- Digital marketer
- Performance marketing and marketing planning
Share this page
Instagram and TikTok have no web share button, so we open your phone's share sheet or copy the link instead.
Related
eSIM plans for Hong Kong
Ranked by our value score. Each plan page lists the networks its supplier declares.
Fixed
Hong Kong 20GB 30 days
csl / SmarTone
- Data
- 20GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$14.90$14.15
Hong Kong 10GB 30 days
csl / SmarTone
- Data
- 10GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$8.90$8.45
Hong Kong 50GB 180 days
csl / SmarTone
- Data
- 50GB
- Validity
- 180 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$44.90$42.65
Hong Kong 5GB 30 days
csl / SmarTone
- Data
- 5GB
- Validity
- 30 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
- Top-up ready
Validity starts on first connection at the destination
from$4.90$4.65
Hong Kong 10GB per day
csl / SmarTone
- Data
- 10GB per day
- Validity
- sold per day, up to 365 days
- Hotspot
- Yes
- Technology
- 3G / 4G / 5G
- 5G ready
- Hotspot
Validity starts on first connection at the destination
- Daily, no top-up
from$8.90$8.45