Best eSIM for HK — Prepaid Data Plans & Prices

By Flavia Voican · Updated 2026-04-10

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eSIM Guide for Hong Kong

For Hong Kong, eSIM is the smartest choice. You’ll avoid all the hassle of physical SIM top-ups. Airalo is your best bet—super reliable, cheap, and works on all Apple/Android devices. Yesim and Holafly work too, but Airalo has the best deals and coverage.

Top eSIM Providers & Prices

• Airalo: $5 for 1GB (3 days), $12 for 5GB (7 days). Covers all 4 major networks (CSL, 3HK, SmarTone, HK Mobile) via their partnerships. Best for short trips.
• Yesim: $7 for 2GB (7 days). Less reliable coverage in some areas.
• Local eSIMs (SmarTone, CSL): Only available to residents. Don’t bother with these as a tourist.

Coverage & Activation

Every eSIM here piggybacks on the major networks (CSL, 3HK, SmarTone, HK Mobile). You’ll get solid coverage in the city and even in New Territories. No dead zones in tourist areas.

Activation tip: Download the Airalo app before you land. Scan the QR code on your phone when you land—no internet needed. For dual-SIM, set up the eSIM first (Settings > Cellular > Add eSIM), then insert your physical SIM in slot 1. It works like a charm.

Physical SIM: How to Buy & Top Up (The Real Guide)

This is the part where most tourists get stuck. You buy a SIM at the airport, use it for a day, then panic when data runs out. Here’s how to actually recharge without crying in a convenience store.

Actual Mobile Operators

Four main carriers: CSL, 3HK, SmarTone, and HK Mobile. All sell tourist SIMs. CSL is the most popular (best coverage), 3HK is cheaper, SmarTone is slow, HK Mobile is budget.

Where to Buy (Avoid the Airport Counter)

• Airport (HKIA): Avoid carrier booths—they’re slow. Go to the “SIM Card” shop near baggage claim (not the main counters). Staff here speak English.
• Convenience Stores: 7-Eleven, Circle K, and Wellcome sell SIMs. Look for the "SIM Card" section. No English help—just point to the tourist pack.
• Carrier Shops: Find them in malls (like iSQUARE, Harbour City). Best for staff who speak English.

How to Top Up (The Real Way)

Forget apps—they’re in Cantonese. Here’s how to actually refill data:

1. Convenience Stores (7-Eleven, Circle K, Wellcome)

Go to the counter. Say: "I need to top up my mobile data. 30 Hong Kong dollars, please." Only cash works. They’ll scan a QR code on the screen and give you a receipt. NO credit cards. Buy a $30 voucher (covers 1 month of light data). If they ask for your SIM number, say: "I don’t have it. Just top up the card." (They’ll ask for the SIM number, but it’s okay to say you don’t know it.)

2. Carrier Apps (Only for locals—avoid)

CSL’s app requires a Chinese ID. 3HK’s app is in Cantonese. SmarTone’s app is useless for tourists. Don’t waste time trying to use these.

3. USSD Codes (For Checking Balance & Buying Packs)

These are your lifeline. Dial them from your phone:

• CSL: 123# (check balance), 123*1# (buy 1GB for $10)
• 3HK: 125# (check balance), 125*1# (buy 1GB for $12)
• SmarTone: 123# (check balance), 123*1# (buy 1GB for $15)

Pro tip: Dial *123# first to check your balance. If you’re low, dial the buy code. It’s instant.

4. Top-Up Voucher Cards (Scratch Cards)

Find these at 7-Eleven, Circle K, or carrier shops. They’re $30, $50, or $100. Scratch off the code, then dial *123# (CSL) or *125# (3HK) and enter the code. Only cash for the card.

Common Problems Tourists Face

• Language barrier: Store staff don’t speak English. Say "Top up data, please. $30." Keep it simple.
• Apps only in Chinese: Ignore them. Use USSD codes or convenience stores.
• Credit cards rejected: All top-ups require cash. Have HK$30-$50 in bills.
• Stores think you want a new SIM: Point to your existing SIM card and say: "Top up, not new SIM."

Pro Tip: If You’re Stuck Without Data

1. Go to a 7-Eleven (they’re everywhere). Say: "I need to top up my mobile. 30 Hong Kong dollars." (Hand over cash.) 2. If that fails, use free hotel Wi-Fi to dial the USSD code on your phone (*123# for CSL). 3. Never try to recharge at the airport—wait for the carrier shop near baggage claim instead.

Verdict: eSIM Wins for Hong Kong

Look, Hong Kong’s physical SIM top-up system is a mess for tourists. You’ll waste hours at convenience stores trying to explain "top up data" in broken Cantonese. The USSD codes

Plan Your Trip

📱 Yesim eSIM — 18% commission, code FALLY20
📱 Airalo eSIM — 12% commission, 200+ countries
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