First identify what is failing: adding the eSIM, connecting to a network, or using the internet after connection. Those are different problems. Keep the exact error message and your order instructions available, and avoid deleting the eSIM as a first troubleshooting step.
1. The eSIM will not install
Check your exact device model, regional variant and carrier-lock status. Use a reliable internet connection and the installation method supplied with your order. A phone supporting eSIM does not guarantee that it accepts another provider while carrier-locked.
If the QR code is reported as used or invalid, contact support rather than repeatedly deleting and reinstalling profiles. Reuse and replacement depend on the plan. Keep activation codes out of public screenshots.
2. Installed, but no service
Confirm you are in a country included by the purchased plan and that its validity has not expired. An installed profile may not connect to a supported network until you reach the destination. Installation alone is not proof of activation or coverage.
Check that the travel line is enabled and follow the order's network-selection instructions. On iPhone, Apple recommends trying Airplane Mode on and off, toggling the affected line, and restarting the device when troubleshooting setup. Do not assume a specific local operator is supported without checking the selected plan.
3. Signal bars, but no mobile internet
Select the travel eSIM as the mobile-data line. Apply the roaming and APN settings specified in your order; do not copy an APN from an unrelated provider. Review home-SIM roaming and automatic data switching separately to avoid unintentionally using your home plan.
Check whether the allowance is exhausted and whether the plan stops data or reduces speed afterward. Test more than one website or app: a single app failing does not by itself establish that the eSIM has no data connection.
4. Internet works, but hotspot or calls do not
Check whether the particular plan allows tethering and includes a phone number, calls or SMS. A data connection does not establish that these additional features are included. If only a connected laptop or tablet fails, check the hotspot setup as well as the plan's restrictions.
5. What to send support
Use the official contact channel and provide your order reference, exact phone model, operating-system version, destination, approximate problem time and the error message. Describe which of the stages above fails and what you have already tried. Hide passwords, payment details and activation QR codes from screenshots unless a trusted support process specifically requires relevant private information.
Keep the eSIM installed unless support instructs otherwise. Apple advises against erasing an eSIM as a troubleshooting step unless directed by the carrier. A factory reset or network reset is not an appropriate blanket first instruction.