

A travel eSIM hotspot can show “connected” while the other device has no internet because Wi-Fi between the devices is working but the phone has no usable mobile-data connection to share. First open a website on the host phone with Wi-Fi off. If that fails, fix its travel eSIM connection before changing hotspot settings. A co:sim data-only plan is one example: confirm it is the selected mobile-data line and check its plan details before testing a second device.
A hotspot has two separate links. Your laptop or companion's phone joins the host phone over Wi-Fi, while the host phone reaches the internet over its mobile-data line. A “connected” symbol proves only the first link. It says nothing about roaming settings, the selected eSIM, a depleted allowance, temporary network trouble or a plan's tethering rules. Apple's Personal Hotspot guide explicitly ties hotspot access to the iPhone's cellular-data connection; Google's Android tethering guide explains the same sharing model.
Turn off Wi-Fi on the host phone, open a fresh webpage, and wait for it to load. Avoid testing a page already cached in the browser. If the phone itself cannot browse, skip ahead to the eSIM checks below. If it can browse, keep mobile data on and focus on hotspot and client-device settings. This simple split prevents repeated resets that cannot fix the real problem.

Confirm which line supplies data. On iPhone, open Settings > Cellular (or Mobile Data) > Cellular Data and choose the installed travel eSIM. On Android, open Settings > Network & internet > SIMs and inspect the mobile-data SIM. Menu labels vary by device maker and system version.
Test with Wi-Fi off. Check that mobile data is enabled, then load a new page on the host phone. Some travel plans need data roaming enabled on the travel eSIM; check that plan's setup instructions, and keep roaming disabled on your home line if you want to avoid home-carrier charges.
Check the plan and signal. A signal icon does not prove the plan has remaining usable data. Look at the plan status, its validity and any allowance or fair-use rule. co:sim shows plan details in the account dashboard; consult the specific plan page for network, billing-start and top-up terms instead of assuming every plan behaves alike.
Move and retry. Step away from an underground platform or dense terminal interior, toggle airplane mode off and on, then retest the host phone. If the eSIM still cannot browse, follow the supplier's APN and network-selection instructions shown for that plan. Do not copy an APN from another carrier.
Do not delete an eSIM as an early troubleshooting step. Reinstallation can be restricted, and removing it while travelling may leave you without a way to retrieve setup details. Save the order email and use a separate connection to contact support if the host phone remains offline.
Apple's current hotspot troubleshooting steps start with checking that the carrier enables Personal Hotspot and that the service is configured. Once mobile data works on the host iPhone, open Settings > Personal Hotspot (or Settings > Cellular > Personal Hotspot) and turn on Allow Others to Join. Keep this screen open while the second device joins. Recheck the Wi-Fi password and forget the old hotspot network on the receiving device if it stored a bad configuration.
If the receiving device connects but cannot load a fresh page, disable any VPN temporarily on both devices and retest; a VPN can affect routing, but it is not the only possible cause. Restart both devices and check for system updates when practical. Apple's guide also recommends Maximize Compatibility on supported iPhones when another device cannot connect reliably. That setting changes the hotspot's Wi-Fi behavior; it does not create cellular data if the iPhone itself is offline.
When a co:sim plan is the chosen data line, keep the home SIM's default data selection from silently switching back during this test. iPhone dual-SIM settings can allow cellular-data switching. Read the active line name on the Cellular Data screen again after reconnecting. If the travel eSIM works on the iPhone but hotspot traffic still fails, check the plan's tethering policy or ask support with the exact device model and error shown.
Google describes the usual path as Settings > Network & internet > Hotspot & tethering > Wi-Fi hotspot. On Samsung and other Android phones the labels may differ. First confirm the travel eSIM is selected for mobile data and can load a fresh page with the phone's Wi-Fi off. Then disable and re-enable Wi-Fi hotspot, change its password if another device keeps reconnecting with stale details, and make the receiving device forget and rejoin the network.
Some Android devices allow USB or Bluetooth tethering. If those work while Wi-Fi hotspot does not, you have narrowed the fault to the local Wi-Fi sharing link. If none works despite browsing on the host phone, review carrier restrictions and the device's data-saver, VPN and hotspot settings. Google notes that some mobile carriers limit or charge extra for tethering, so never infer permission from the hotspot switch being visible.
For a travel eSIM, inspect the purchased plan's terms rather than extrapolating from another destination. Data-only means the plan provides mobile internet, not a local phone number. The receiving laptop can use internet apps through the host connection, but a hotspot does not add voice or SMS service to the eSIM.
Stop repeated resets once you know which link fails. If the host phone cannot browse after the correct data line, roaming setting and plan status are checked, record the location, time, device model and any network name or APN shown. If only one client fails, record its operating system and whether another client works. If every client fails while the host phone browses, note whether VPN, USB tethering or a different hotspot band changes the result.
Send those observations with the order information to the plan's support team. They are more useful than “hotspot does not work” because they separate mobile-network, account and local Wi-Fi faults. You can find plan information in the account dashboard and compare the listed network and top-up support with what the phone currently shows. Do not purchase a second plan until you know whether the first has a data, setup or policy issue.
Once the host phone browses normally, reconnect the second device and test again. Compare available travel data plans before your next trip; for a concrete destination example, the Japan eSIM choices show the plan-specific details you should read before relying on a hotspot.
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“Connected” means the laptop joined the phone's Wi-Fi hotspot; it does not prove the phone has internet to share. Turn off Wi-Fi on the phone that holds the travel eSIM and load a new webpage using mobile data. If that page fails, check the selected data line, the eSIM's required roaming setting, signal and plan status before touching the laptop. If the phone browses normally, forget the hotspot network on the laptop, rejoin with the current password, and temporarily pause VPN software to test routing. Try another client if one is available. With a co:sim data-only plan, read the specific plan page and dashboard details rather than assuming hotspot support, data balance or top-up eligibility from the Wi-Fi icon. This sequence tells you whether the fault is cellular, plan-related or confined to the laptop's local connection.
Do not assume any travel eSIM always permits tethering. The phone's hotspot switch can appear even when the active mobile plan, underlying network or device combination restricts sharing. First verify that the co:sim eSIM itself can browse on the host phone. Then inspect the purchased plan's terms and destination network details, and test one receiving device. If the host phone works but the client does not, follow the iPhone or Android steps above and ask support to confirm the plan's hotspot conditions if the issue persists. A co:sim plan is data-only: sharing its data connection can provide internet to a laptop, but the plan does not include a telephone number, normal voice calls or SMS. The answer can vary by plan and destination, so a successful hotspot on one trip does not guarantee the same behavior on another.
Many travel eSIM setup instructions require data roaming on the travel line because the eSIM uses a partner mobile network in the destination. Enable it only if the purchased plan's instructions say to, and verify that the travel eSIM is the selected mobile-data line. You can leave roaming off on your home SIM to avoid accidental home-carrier billing. After changing the setting, test a fresh webpage on the host phone before reconnecting any hotspot clients. A hotspot cannot repair a phone that has no usable cellular data. Use the instructions and network information attached to your specific plan; roaming requirements and billing-start rules are plan-specific. If the host phone still cannot browse, record the device model and network shown and contact support rather than repeatedly removing or reinstalling the eSIM.
Mexico
1-day trip pass
From $2.99
Canada
1-day trip pass
From $2.99
Brazil
Valid 7 days
From $3.99
Instant delivery by email · Install before you fly
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