What's better - local SIM or international roaming?

Local SIM is almost always cheaper for stays over 3 days. Roaming costs $10-15 per day, while local SIMs give you more data for $5-15 total.

Can I keep my WhatsApp with a new SIM?

Yes, WhatsApp stays linked to your original number. You'll receive the verification code on your home SIM, so keep it accessible or use WhatsApp Web.

Do eSIMs work everywhere?

Not yet. Many newer phones support eSIM, but not all countries offer them. Physical SIMs are still the reliable option in most destinations.

What if I can't unlock my phone?

Use a cheap unlocked phone for travel, rent a pocket WiFi device, or stick to WiFi and accept the limitations. Don't buy a local SIM if your phone is locked.

How to Use a SIM Card Abroad

Buy a local SIM card at the airport or mobile shops for cheaper data and calls than roaming. Unlock your phone before travel and bring a SIM ejector tool.

Check if your phone is unlocked. Call your carrier or try a different SIM card at home. Locked phones won't work with foreign SIMs. Unlock it before you leave - this can take 1-3 days.
Research local carriers. Look up the main mobile networks in your destination country. Check their tourist SIM packages and coverage maps online before you go.
Bring a SIM ejector tool. Pack the little metal tool that came with your phone, or bring a paperclip. You'll need this to swap SIM cards.
Save your home SIM safely. Keep your original SIM card in the plastic holder the new one comes in, or tape it inside your passport cover. Don't lose it.
Buy at the airport or city center. Airport kiosks are convenient but pricier. City mobile shops offer better deals. Bring your passport - it's required for SIM registration in most countries.
Choose the right plan. Tourist plans typically offer 7-30 days of service. Get more data than you think you need - it's cheaper than topping up later.
Activate and test immediately. Don't leave the shop until you've made a test call and checked your data works. Save the shop's number and your new local number in your phone.

What's better - local SIM or international roaming?: Local SIM is almost always cheaper for stays over 3 days. Roaming costs $10-15 per day, while local SIMs give you more data for $5-15 total.
Can I keep my WhatsApp with a new SIM?: Yes, WhatsApp stays linked to your original number. You'll receive the verification code on your home SIM, so keep it accessible or use WhatsApp Web.
Do eSIMs work everywhere?: Not yet. Many newer phones support eSIM, but not all countries offer them. Physical SIMs are still the reliable option in most destinations.
What if I can't unlock my phone?: Use a cheap unlocked phone for travel, rent a pocket WiFi device, or stick to WiFi and accept the limitations. Don't buy a local SIM if your phone is locked.