Optus International Calling: Plans and Free Call Options

Optus Prepaid International Call Packages

If you use Optus prepaid service and need to call overseas, Optus offers several ways to manage international costs: pay-as-you-go rates, destination-specific add-on packs, and occasional promotional inclusions. Prepaid customers choose the option that best fits their calling pattern — short bursts, regular monthly calls, or occasional long calls.

How prepaid packages typically work

• Pay-as-you-go: You keep credit on your prepaid account and international calls deduct from that balance at Optus’s standard international rates for each destination. These rates vary by country and by whether you call a mobile or landline.
• Destination packs: Optus sells add-on packs that give you a block of minutes to a group of countries (for example, Asia, Europe, or North America) or to specific countries. Buying a pack usually lowers the per-minute cost compared with pay-as-you-go.
• Time-limited offers: Optus sometimes runs limited-time promotions where prepaid customers get bonus international minutes or discounted rates for a period.

How to choose a pack

1. Estimate your monthly minutes to each destination. If you call one country frequently, a country-specific pack often saves more than a general pack.
2. Compare the pack price divided by included minutes to the pay-as-you-go per-minute rate. Example: A 300-minute pack for $30 gives an effective rate of $0.10/min.
3. Check the pack’s validity window and whether unused minutes roll over (most prepaid packs expire).

How to buy and manage packs

• Use the My Optus app or the Optus website to view and purchase available international packs.
• You can usually buy a pack with your existing prepaid credit. The pack activates immediately and uses minutes before your pay-as-you-go balance.
• If you prefer self-serve guides, Optus help pages and customer support show current pack options and exclusions.

If you want a quick comparison between carrier-based international calling and internet-based alternatives, read our guide on voip phone services: /guide/voip-phone-services-explained/.

Free International Call Countries

“Free international calls” from Optus are not a standard, permanent offering across many countries. Carriers typically reserve free international calling for specific promotions, bundles, or to other network numbers during limited campaigns. Here’s what to expect and how to find genuinely free options.

When Optus might offer free international calls

• Promotional periods: Optus sometimes advertises free minutes to selected countries for a limited time to attract new or returning customers.
• Bundled offers: Certain postpaid plans or promotional add-ons occasionally include free minutes to specific countries as a bundle feature.
• Domestic “free call” zones: Optus commonly offers free calls to other Optus numbers within Australia, but that doesn’t apply to international destinations.

How to check if a country is included for free

• Log into My Optus or check the active inclusions on your plan. Promotions and included countries will be listed there.
• Read the small print. Free-minute offers typically apply to landlines or mobiles only, and to selected destinations.
• Confirm the validity period and whether minutes expire.

Free alternatives that actually work If Optus doesn’t include the free international call country you need, try these zero-cost options:

• Free online video/sound calling platforms over WiFi — the easiest true-free routes for person-to-person calls. See our comparison of free online video calling platforms: /guide/free-online-video-calling-platforms/.
• Free virtual numbers or trials from VoIP providers for inbound calls. See /guide/free-virtual-phone-numbers/ for options.
• Messaging apps with voice or video calling (e.g., WhatsApp, FaceTime) — free over WiFi and often higher audio quality than low-cost international voice calls.

In short, “Optus free international calls” can exist in narrow, temporary scenarios. For consistent low-cost or free calling, use internet calling or a dedicated VoIP service.

Pricing and Rates Breakdown

Optus structures international charges by destination and by whether you use a pack or pay-as-you-go credit. Because rates change and promotions appear, always confirm current rates on Optus’s official pages. Below I’ll explain the pricing concepts and show how to run cost comparisons so you understand the real cost per minute.

Key pricing elements

• Base pay-as-you-go rate: This is the default per-minute rate Optus applies if you haven’t purchased a pack. It varies widely by country and can be substantially higher than pack or VoIP alternatives.
• Pack rate: The effective per-minute cost when you buy a prepaid international pack (pack price ÷ included minutes).
• Extra fees and connection charges: Optus currently doesn’t apply separate “connection fees” beyond per-minute charges for most international calls, but read the pack terms.
• Billing increments: Optus typically bills calls in per-minute increments; check your plan details for exact rounding rules.

How to calculate and compare costs

1. Find Optus’s pay-as-you-go rate for the destination you call. If you’re unsure, use the Optus international rates lookup.
2. If an add-on pack exists, calculate its effective per-minute cost. Example: a $20 pack with 200 minutes means $20 ÷ 200 = $0.10/min.
3. Run example scenarios:
   • Scenario A (pay-as-you-go): 60 minutes × pay-as-you-go rate.
   • Scenario B (pack): Pack price + any excess minutes at pay-as-you-go rate.
4. Compare total costs and choose the cheaper option.

Illustrative example (hypothetical)

• Pay-as-you-go rate to Country X: $1.20/min
• Pack: 300 minutes for $40
• If you make 100 minutes in a month:
  • Pay-as-you-go cost = 100 × $1.20 = $120
  • Pack cost = $40 (you used 100 of the 300 included minutes) → pack saves $80

VoIP and app alternatives If the numbers above look high, consider internet-based calling. VoIP apps work over WiFi or mobile data and often offer dramatically lower per-minute rates to many countries. For example, Telvio lists rates from $0.02/min to the US and $0.08/min to India, with per-second billing and no connection fees. Telvio sells credit packs ($1.99, $4.99, $9.99), credits never expire, and you get 1 free minute on first install — useful if you want to compare carrier costs directly.

To learn more about dialing procedures and when to pick an app versus a carrier pack, see /guide/how-to-make-international-calls/.

Special note on O2 top up international calls If you also use O2 (UK), topping up Pay As You Go credit typically allows you to make international calls at O2’s pay-as-you-go rates or buy O2 international add-ons. If you search “o2 top up international calls,” treat O2 top-up credit as flexible, but verify O2’s country rates or bolt-ons before calling. Many users who travel between networks compare O2’s bolt-on options with VoIP apps for the best value.

How to Activate International Calling

Turning international calling on for an Optus prepaid SIM usually takes a few straightforward steps. Activation methods vary slightly depending on whether you use the Optus website, the My Optus app, or customer service, so follow the method that fits you.

Step-by-step activation (prepaid)

1. Ensure you have sufficient prepaid credit. International packs and calls draw from your prepaid balance.
2. Open the My Optus app or log into your My Optus account on the Optus website.
3. Browse “Add-ons” or “Prepaid packs” and locate international call packs for the country group you need.
4. Purchase the pack using your existing credit or payment method. The pack should activate immediately.
5. To make a call, dial the international access code (from Australia that is 0011) or use the + sign followed by the country code and number (for example +1-202-xxx-xxxx).
6. If you cannot place international calls after activating a pack, check your plan details or contact Optus support to ensure international calling is enabled on your SIM.

Activate via SMS or USSD

• Some regions support purchasing packs by sending a keyword via SMS or using a USSD code to open the add-on menu. Check current Optus instructions in the app.

When to contact support

• If your calls fail, check that you aren’t blocked from international calling for security reasons.
• If pack minutes do not appear or a purchase fails, Optus customer service can confirm activation and adjust settings if needed.

Alternatives to activation If you need international calling without changing your Optus setup, use a VoIP app on WiFi. VoIP removes the need to buy a carrier pack and it works on any smartphone. For more on using internet calling reliably and legally alongside carrier calls, see /guide/voip-phone-services-explained/.

Money-Saving Tips for Overseas Calls

If you make overseas calls regularly, small choices add up. Below are practical tactics to lower your monthly bill without sacrificing call quality.

1. Buy the right pack or bundle

• Match the pack to the country you call most. Country-specific packs usually offer the best per-minute value.
• Don’t overspend on a large pack you won’t use; calculate expected minutes and pick the closest match.

2. Use VoIP apps for frequent calls

• Apps that route calls over WiFi or mobile data typically cost less than carrier rates. For voice-only needs, a small credit pack on a VoIP app can be far cheaper than a carrier pack. See our free online video calling comparison for no-cost options: /guide/free-online-video-calling-platforms/.

3. Take advantage of WiFi calling and video calling

• If both parties have a good internet connection, use WiFi voice or video calls to avoid per-minute charges entirely. Messaging apps and video platforms work well and cost nothing over WiFi.

4. Use local access numbers or callback services

• Some services give a local access number that connects you to the overseas recipient. These can lower mobile charges if you have cheap local minutes or free incoming calls.

5. Try virtual numbers for inbound calls

• If people abroad call you, using a virtual number in their country can lower their cost to call you. Learn how virtual numbers work: /guide/virtual-phone-numbers-guide/ and check free virtual number options at /guide/free-virtual-phone-numbers/.

6. Leverage per-second billing services

• Look for providers that bill by the second. Per-minute rounding on carrier calls can waste money. Telvio, for example, bills per second, so you pay only for the exact call length.

7. Compare total cost, not just per-minute rate

• A low per-minute rate with a large connection fee or a pack that forces you to buy many unused minutes can cost more overall. Always calculate your typical monthly usage.

8. Monitor and control usage

• Set a budget and use the My Optus app to track spend. For prepaid users, only top up what you need and buy packs that match that top-up frequency.

9. Consider the recipient’s device

• If the person you call can use a messaging app or receive a VoIP call, convert voice calls to data-based calls where possible.

10. Try a trial minute or free minute offers

• Many VoIP apps and some carriers offer a free trial minute or promotional credit on first install. For a quick test, Telvio gives 1 free minute on first install so you can compare audio quality and cost quickly.

Applying these tips together — for example using a small Optus pack for occasional calls and a VoIP app for frequent calls — usually yields the best savings.