Home / Blog / Life
Life

オーストラリアSIM完全ガイド2025 — Telstra vs Optus vs Boost

Australia SIM Guide 2025: Telstra vs Optus vs Boost

Getting connected is one of the first things to sort on arrival. The wrong SIM can leave you with no signal in regional areas — so it's worth choosing carefully.

Major Carrier Comparison (2025)

CarrierCoverageEst. MonthlyBest For
🔵 TelstraBest (incl. rural)$30–$65Travel, farm work, regional stays
🟡 OptusGreat in cities$25–$55City-based stays
🔴 VodafoneGood in cities$20–$45Budget, city-based
🟠 BoostTelstra network$20–$40Telstra coverage at lower price
⚪ AmaysimOptus network$15–$30Budget, city only

What About eSIM?

Most modern iPhones (XS and later) and many Androids support eSIM — letting you activate a plan before you arrive without swapping a physical SIM. Your phone must be SIM-unlocked and eSIM-compatible.

⚠️

Unlock your Japanese phone before departing. Without SIM unlocking, no Australian SIM will work on your device — regardless of which carrier you choose.

SIM Selection Checklist

  • ✅ How long is your stay? (Under 1 month / Several months / 1 year+)
  • ✅ Staying in cities only, or going regional (Farm Work)?
  • ✅ How much data do you use? (Heavy / Medium / Light)
  • ✅ Is your phone eSIM-compatible and SIM-unlocked?

Buying at the Airport

Sydney and Melbourne airports have carrier shops (Telstra, Optus and Boost are most visible). Prices are slightly higher than online, but you get connected immediately on arrival day.

Summary: Which Should You Choose?

Going regional or doing farm work? Telstra is the clear choice. City-based stays? Optus or Boost offer great value. Short trip only? Amaysim is perfectly sufficient.

AN
AussieNavi Team
Australia Study & WHV Specialists

A bilingual team with hands-on experience living, studying and working in Australia — sharing real, up-to-date information.

Need Help Choosing a SIM?

Tell us your phone, stay length and data usage — we'll point you to the right plan.

Book a free consultation →
Chat on WhatsApp
Design by WebProxima
i