Why is my UK roaming data not working in the USA?
Answer
Turn on Data Roaming for the travel line, manually select a partner network such as T-Mobile if automatic selection fails, and set Mobile Data to the Lebara line instead of a secondary or unknown line.
Before you start: stop right away if…
- Only change APN values using official carrier instructions for your brand of SIM.
Follow these steps
Enable data roaming
Go to Settings > Mobile Data / Cellular, open the Lebara or travel line options, and turn Data Roaming on.
You should see: Data Roaming is enabled for the travel line.
Pick the mobile data line
Go to Settings > Mobile Data and select the Lebara line instead of Secondary or Unknown.
You should see: Lebara is the line used for cellular data.
Try manual network selection
Go to Settings > Mobile Data > Network Selection, turn Automatic off, wait a minute, then try T-Mobile or another listed partner.
You should see: The iPhone attaches to a partner network.
Toggle Airplane Mode
Turn Airplane Mode on for 15 seconds, turn it off, and retest a webpage with Wi-Fi disabled.
You should see: Mobile data begins working, or a carrier APN/support check is needed next.
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Extra tips
What to look for: No LTE/5G data icon, Data Roaming off, Network Selection set to Automatic, and Mobile Data assigned to Secondary or Unknown instead of Lebara.
Before you change anything: Confirm the roaming bundle is active in the Lebara or carrier account. Keep Wi-Fi available for account checks. Note whether calls or SMS still work without data. Avoid random APN apps from unknown sources.