Work through the steps below in order. The vast majority of cases are caused by: carrier-locked device, QR code already used, subscription not yet active, or device incompatibility.
Tip: If your eSIM installed successfully but shows no service, go to My eSIM has no mobile data or is not connecting instead.
Step 1 — Confirm your subscription is active
Log in to your MyBundle account and open Mobile Dashboard.
Step 2 — Confirm your device is eSIM compatible and carrier-unlocked
Your device needs a 32-digit EID number and must be carrier-unlocked. See Is my device eSIM compatible? China-region iPhones (CH model) and South Korea Samsung devices do not support eSIM — no workaround.
Step 3 — Check your QR code has not already been used
A QR code can only be used once. check the Mobile Dashboard in your MyBundle account to see if an eSIM is already shown as installed on your account. If so, check your device SIM settings before requesting a new code.
Step 4 — Make sure you are on Wi-Fi
A stable Wi-Fi connection is required to download an eSIM profile.
Step 5 — Try the other activation method
If the QR code isn't working, try the manual activation code — or vice versa. See QR code vs manual activation.
Step 6 — Restart your device and try again
A restart clears temporary errors that can block eSIM installation. After restarting, attempt the installation again from the beginning.
Error message reference
Error message — Most likely cause — Fix
"Unable to complete cellular plan change" (iPhone) — Carrier-locked device — Settings → General → About → Carrier Lock must say No SIM restrictions. Contact original carrier if locked.
"Couldn't add mobile plan" / "Download failed" (Android) — Carrier lock or connectivity — Confirm device is unlocked and on Wi-Fi. Try manual code.
"This QR code has already been used" — Profile already downloaded — Check device SIM settings first. Request new code only if eSIM is not on any of your devices.
"SIM not supported" / "Device not compatible" — No eSIM chip or locked device — Check for EID via *#06#. See Is my device eSIM compatible?
"No activation code found" (iPhone) — iOS version below 12.1 — Settings → General → Software Update