How to Fix eSIM No Service or Data Issues While Abroad

To fix an eSIM with no service abroad, ensure that 'Data Roaming' is toggled ON in your phone's cellular settings for the specific eSIM profile. If you still have no bars, manually select a supported local carrier in your network settings and restart your device to force a fresh connection.\n\nThere is nothing quite like the sinking feeling of landing at Denpasar or Narita, switching off Airplane Mode, and seeing those dreaded words: 'No Service.' You’ve ditched the expensive Telstra International Day Pass and the Optus daily roaming fees for a sleek AussieRoam eSIM, but now you’re stuck without a map or a way to call a Grab. Don't panic. Usually, the fix is a simple setting away. Whether you are navigating the neon streets of Tokyo or the surf breaks of Uluwatu, this guide will get you back online faster than you can say 'where is the nearest Bintang?'\n\n## The Most Common Culprit: Data Roaming\n\nFor most Australians and Kiwis, 'Data Roaming' is a scary term. We have been trained by years of bill shock to keep that toggle firmly switched off. However, when you use a travel eSIM, your phone actually needs to 'roam' onto the local networks in your destination. If you are using an AussieRoam eSIM in Bali, your phone is technically roaming onto the Telkomsel or XL Axiata networks. If the 'Data Roaming' switch is off for that specific eSIM, your data simply won't flow.\n\n### How to fix it on iPhone:\n1. Go to Settings > Cellular (or Mobile Data).\n2. Tap on your AussieRoam eSIM profile.\n3. Ensure the Data Roaming switch is toggled ON.\n\n### How to fix it on Android:\n1. Go to Settings > Network & Internet > SIMs.\n2. Select your Travel eSIM.\n3. Toggle Roaming to ON.\n\n## Manual Network Selection: When 'Auto' Fails\n\nBy default, your phone tries to automatically pick the best network. Sometimes, it gets stubborn and tries to connect to a carrier that doesn't have a roaming agreement with your eSIM provider, resulting in the 'No Service' error. This is common in places like Japan (dest:jp) or the UK (dest:gb) where there are dozens of competing signals.\n\nIf you're in Japan and your phone is trying to force a connection with NTT Docomo but the eSIM prefers SoftBank, you'll see zero bars. To fix this, go into your cellular settings, find 'Network Selection,' turn off 'Automatic,' and wait for the list of local carriers to populate. Try selecting them one by one until you see the 4G or 5G icon appear. In Bali, you'll generally want Telkomsel for the best coverage, especially if you're heading away from the main hubs. For more on arriving in Indonesia, see our guide on getting an eSIM for Bali airport arrival.\n\n## Comparison: Travel eSIM vs. Home Carrier Roaming\n\n| Feature | Home Roaming (Telstra/Optus) | AussieRoam eSIM |\n| :--- | :--- | :--- |\n| Cost | $5-$10 per day | One-off upfront cost |\n| Data Allowance | Often 500MB-1GB per day | Large buckets (10GB-50GB+) |\n| Network Speed | Throttled after small limits | Local 4G/5G speeds |\n| Activation | Automatic (and expensive) | QR code scan at home or airport |\n| Number | Keep your AU/NZ number | Data only (no local number) |\n\n## Why 'Data Only' Matters\n\nIt is important to remember that AussieRoam eSIMs are data-only plans. This means you won't get a local Indonesian or Japanese phone number. While this might seem like a drawback, it’s actually a win. You avoid those pesky marketing calls and can keep using WhatsApp, iMessage, and Messenger with your Australian or Kiwi identity. If you need to book a ride-share in Bangkok, having a solid data connection is more important than a local SIM. For a deeper look at the tech, read about Thailand eSIM vs Physical SIM.\n\n## Destination-Specific Troubleshooting\n\n### Japan (dest:jp)\nJapan’s networks are incredibly advanced but can be finicky with foreign devices. If you have 'No Service' in Tokyo or Osaka, check if your phone supports the local LTE bands. Most modern iPhones and Pixels are fine, but it’s worth checking your phone's compatibility before you leave. If you are skiing in Niseko and the signal drops, try switching your 'Voice & Data' setting from 5G to 4G/LTE. Sometimes the local 5G towers are congested or have limited range in the mountains.\n\n### Thailand (dest:th)\nIn Thailand, the big players are AIS, DTAC, and TrueMove. If you land in Bangkok and have no data, manual selection is your friend. AIS usually has the best coverage in rural areas and islands. If you are planning to use Bolt or Grab to get from Suvarnabhumi Airport to your hotel, you need that data working immediately. Always install your eSIM while you are still on the airport WiFi in Sydney or Auckland, or use the free airport WiFi on arrival to finish the activation. You can find more about the setup process here.\n\n### United Kingdom (dest:gb) and Europe (dest:eu-42)\nTraveling through Europe often means crossing borders every few days. While our eSIMs support multi-country roaming, your phone might get 'confused' when you cross from France into Spain. If you lose service at the border, toggle Airplane Mode on and off. This forces the phone to scan for the nearest tower in the new country. In the UK, if you find yourself in a 'dead zone' in the London Underground or rural Scotland, don't forget that your eSIM needs a clear line of sight to a tower, just like a regular SIM.\n\n## The 'Nuclear' Option: Reset Network Settings\n\nIf you’ve checked the roaming toggle, tried manual network selection, and restarted your phone three times with no luck, it might be time for a network reset. This clears out all saved WiFi passwords, Bluetooth pairings, and cellular configurations. It’s a bit of a pain, but it often clears the digital 'cobwebs' that prevent an eSIM from registering. On iPhone, this is under Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings.\n\n## APN Settings: The Technical Fix\n\nIn rare cases, the Access Point Name (APN) doesn't configure itself automatically. The APN is essentially the 'address' your phone uses to connect to the internet. Most AussieRoam eSIMs will set this for you, but if you have bars of signal but no data (no 4G/LTE icon), you might need to enter it manually. You can find the specific APN for your plan in the installation email we sent you. Just copy and paste it into the Cellular Data Network section of your settings, and you should be flying.\n\n## Avoiding the Roaming Trap\n\nOne of the biggest reasons Aussies switch to eSIMs is to avoid the 'roaming trap.' Telstra and Optus make it very easy to just 'leave your SIM on' and pay $10 a day. Over a two-week holiday in Europe (dest:eu-42), that is $140 gone before you’ve even bought a croissant. By using a dedicated travel eSIM, you have total control over your spend. Just remember to set your AussieRoam eSIM as the 'Cellular Data' source and keep your home SIM for 'Default Voice Line'—but make sure data roaming is turned OFF for that home SIM to avoid those sneaky charges.\n\n## The bottom line\n\nFixing eSIM 'No Service' issues usually comes down to three things: turning on Data Roaming, manually selecting a local carrier, or a simple restart. Don't let a technical glitch ruin your first day in paradise. With a little bit of troubleshooting, you can bypass the overpriced home carrier roaming fees and enjoy seamless, local-speed data across the globe. Land, connect, and start exploring.