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What happens when you put an international SIM card in your phone?
Roaming SIM cards allow a user to make international calls but often lead to costly roaming charges. In contrast, local SIM cards, assigning your phone a local number, is helpful for temporary use during travel but may not be ideal for long-term solutions.Some SIM cards are designed to be used only within the country of purchase, while others are designed to be used internationally. Additionally, many countries have different telecommunications standards and frequencies, so a SIM card that works in one country may not work in another.Make sure that your phone is set to use the correct network. You can do this by going to Settings > Network & internet > Mobile network. Restart your phone. This can sometimes fix problems with your phone's software.

What is an international SIM card : An international SIM card is a tad different from a local SIM card, which operates on only one network and geographical area. Unlike a local SIM, an international SIM card is programmed to work on multiple networks in several geographical areas around the world.

Do international SIM cards expire

Although credit on a WorldSIM international SIM card never expires (as long as you use the SIM once a year) many other companies will terminate your SIM if you don't top up every 30 days. Ideally you want to keep your international SIM for life so you always have the same number when you travel.

Which SIM is best for international usage : eSIMs provide an alternative to physical SIM cards. Travel eSIM apps allow you to purchase and instantly activate international data plans directly on compatible phones. Popular options include Airalo, Holafly, and Nomad. These apps often offer flexible data packages and competitive prices.

Mobile telephone networks differ from country to country, and your phone may be incompatible with the networks in the country you are visiting. Your phone might work for voice calls, but other functions – such as text messaging or sending and receiving data – might not.

Unlock Your Phone

Before you can swap out your SIM card, make sure to "unlock" your mobile phone so it can work in the foreign country's wireless network. An unlocked phone isn't tied to a specific mobile carrier and will work with any carrier that uses the same wireless network.

What happens if I use my phone in Europe

When you travel outside your home country to another EU country, you don't have to pay any additional charges to use your mobile phone. This is known as "roaming" or "roam like at home". Your calls (to mobile and fixed phones), text messages (SMS) and data use (web browsing, music and video streaming etc.)Here are some quick checks you can do to determine why roaming isn't working: Make sure that your device is not on 'Flight Mode' or 'Airplane mode'. Make sure that both 'Mobile Data' and 'Data Roaming' settings are switched on. Make sure you are connected to a network that supports mobile data usage.Terms & Conditions:

  1. We only offer this International SIM for free when you buy a prepaid multi-currency forex card from BookMyForex.
  2. The Free International SIM card comes with the initial starter pack, which includes unlimited incoming calls and WhatsApp chats and is valid for 30 days from the activation date.


According to TRAI consumer handbook, a sim card is deemed to be deactivated in case of non-usage for over 90 days (about 3 months). The non-usage here means zero incoming or outgoing calls/messages, no data sessions, no use of value-added services, and any related payment.

What happens to SIM card when not used for a long time : If you don't use your SIM card for a long time, your service provider might deactivate it. To avoid this, make sure you use your phone at least once every three months. You can make a call, send a text message, or use mobile data to keep your SIM card active.

Why use international SIM card : There are many benefits to using an International SIM card, with the best benefit gained being the cost. You can travel and talk to your friends and family without worrying about the ridiculous costs associated with calling, texting, and data plans such as the ones present in regular roaming plans.

Does international roaming include data

International roaming enables you to send/receive calls and texts, use data while overseas. International roaming options include Optus Daily Roaming, $10 Roaming Pass or Standard Roaming Rates which is a pay as you go service.

Roaming (pay-per-use pricing)

Even without an international calling feature, you can still access data, voice, and text when you're traveling internationally, but you will be charged at pay-per-use rates.How to use an international SIM card

  1. Switch off your phone as this will prevent any damage.
  2. Remove your current SIM card and insert your international SIM.
  3. Switch your phone back on. Your SIM may automatically connect to your new network.
  4. While you travel, you may want to top up your SIM.

Can I use a foreign SIM in a locked phone : When a phone is locked to a particular carrier, it's only allowed to connect to that specific network. Having a locked phone will prevent you from being able to connect to the new networks available at your new destination.