Mobile data roaming abroad can be expensive if you use your NZ plan without adding a roaming pack. This guide covers the cheapest ways to stay connected overseas as a New Zealand traveller — from daily roaming add-ons to local SIMs and international eSIMs.
Short trip (1–7 days): Daily roaming add-on from your NZ provider (~$5–$15/day)
Medium trip (1–4 weeks): International eSIM (Airalo, Nomad) — often $10–$30 for 10–30 days
Long trip (1+ months): Local SIM in destination country
Work overseas: Global SIM or international eSIM with sufficient data allowance
Option 1 — Daily Roaming Pack from Your NZ Provider
All three NZ networks offer daily roaming add-ons that give you a daily data/call/text allowance while abroad.
Spark International Roaming
- Daily Roaming Pass: ~$5–$10/day for a daily data allowance (e.g., 500MB–1GB) in many countries
- Available in Australia, UK, USA, Europe, Asia-Pacific, and more
- Activate in the Spark app before departure
One NZ International Roaming
- Daily Pass: ~$5–$15/day depending on region
- Data included: typically 500MB–1GB/day
- Some premium plans include roaming in the monthly price (check your plan)
- Good coverage in Australia, UK, USA, Pacific Islands
2degrees International Roaming
- Daily Roaming Add-on: ~$5–$10/day for participating countries
- Available in major destinations — check 2degrees website for country list
- Lower base plan prices mean roaming may cost slightly more as an add-on percentage
Tips for daily roaming add-ons:
- Enable only when you need it — turn roaming off in phone settings when not in use
- Use WiFi where available to reduce data usage on the daily allowance
- Set data warnings in your phone to avoid bill shock
Option 2 — International eSIM (Best Value for 1–4 Weeks)
An international eSIM lets you keep your NZ number active while adding a local data eSIM for cheap data in your destination. This is often the most cost-effective option for trips of more than a few days.
Popular NZ-compatible eSIM providers:
| Provider | Price range | Best for |
|---|---|---|
| Airalo | USD $5–$30 for 10–30 days | Widest country coverage |
| Nomad | USD $5–$25 | Asia-Pacific focus |
| Roamless | Pay-per-MB | Light data users |
| Holafly | USD $15–$40 | Unlimited data options |
| Ubigi | USD $5–$20 | Europe and North America |
How to use an international eSIM:
- Keep your NZ physical SIM in your phone (for calls on your NZ number)
- Install the international eSIM via the provider’s app before departure
- When overseas, switch data to the international eSIM
- Your NZ SIM continues to receive calls/texts (which may use roaming for incoming calls — check your provider’s incoming call rates)
Option 3 — Local SIM at Destination
For trips longer than 2–4 weeks, buying a local SIM in your destination country is usually the cheapest option. A local SIM gives you local calling rates and cheap data.
Considerations:
- Your NZ phone must be unlocked (not SIM-locked to your NZ provider)
- You’ll need a local address or ID in some countries (Australia, EU)
- You lose your NZ number for calls while using the local SIM (can use WhatsApp/Signal on WiFi for NZ contacts)
- Great for long stays in one country (working holiday, extended travel)
Popular local SIM destinations for NZ travellers:
- Australia: Telstra, Optus, Boost ($20–$30 for 30 days with 10–50GB)
- UK: Lebara, Three, GiffGaff (£5–£15/month)
- USA: T-Mobile, Mint Mobile, Ultra Mobile
- Asia (Thailand, Japan, Korea): Local tourist SIMs widely available at airports
Option 4 — WiFi Calling and Data Minimisation
Before spending anything on roaming:
Use WiFi wherever possible:
- Hotel, Airbnb, cafes all provide free WiFi
- Download offline maps (Google Maps), music, and entertainment before departure
- Use messaging apps (WhatsApp, iMessage, Messenger) on WiFi to avoid SMS costs
WiFi calling: Most NZ providers support WiFi calling — you can make and receive calls on your NZ number over WiFi without using roaming minutes. Check your provider’s app or settings.
Avoiding Bill Shock
Before you travel:
- Turn data roaming off in phone settings (Settings → Mobile Data → Roaming)
- Activate a daily roaming pack or install an international eSIM before departure
- Disable automatic app updates and background data refresh
Daily roaming spend limit: Contact your NZ provider to set a monthly roaming spend cap if concerned about unexpected charges.
Roaming in Australia — The Most Common NZ Case
Australia is the most common destination for NZ travellers. All three NZ networks have competitive Australia roaming rates:
- Spark: Daily trans-Tasman add-on available; or buy an Optus/Telstra prepay SIM on arrival (AUD $10–$30 for 15–30 days)
- One NZ: Daily pass covers Australia; competitive
- 2degrees: Daily pass available; often cheapest for Australia
For a 1–2 week Australia trip: daily roaming pack from your NZ provider is the easiest option. For longer stays: Australian prepay SIM (Boost, Kogan, Optus) offers better value.