How to see which mobile network your phone is using abroad

iPhone: look in Control Center, not the status bar

Apple's guide to status icons says that on an iPhone with Face ID there are additional status icons at the top of Control Center, which you open by swiping down from the top-right corner. For phones with two lines, Apple is explicit: the upper row of bars shows the line you use for cellular data, the lower row shows the other one, and to see the status icons with their plan label and carrier name, you open Control Center.

So you will see two pieces of text per line. The label is yours, whatever you called the line when you set it up, such as Personal or Travel; if they are still called Primary and Secondary, our guide to renaming SIM lines makes this much easier to read. Next to it is the name of the operator.

One exception. When Wi-Fi Calling is in use, Apple says the iPhone shows the carrier name next to the Wi-Fi Calling icon. In that case the name is your operator over Wi-Fi, not a mobile network you are connected to.

Android: About phone, SIM status

• Network: the name of the network the SIM is registered on.
• Roaming: Roaming or Not roaming.
• Service state: In service or Out of service.
• Mobile network state: Connected, Connecting, Disconnected or Suspended.
• Mobile data network type: LTE, 5G and so on.

On a Pixel, open Settings, About phone, SIM status; Google uses the same path in its own help to find the EID. The fields above are the labels in Android's settings, and with two SIMs there is a SIM status entry for each slot. Other brands put it in a similar place, sometimes inside a Status menu; typing SIM status into the search box at the top of Settings finds it.

This screen answers more than the name. Roaming tells you directly whether the line considers itself abroad, which iPhone never shows as an icon, as explained in what the roaming icon means.

What is normal and what is not

• Travel eSIM in Italy showing an Italian network and Roaming: normal. It connects to local networks as a visitor.
• Your usual line, at home, showing a network from the neighbouring country: it has jumped across the border.
• In service but Disconnected: the line is registered, but no data is flowing through it.
• A country pack showing Out of service before you arrive: expected, it only connects in its own country.

The third case is the one people misread. The line hears a network, so the bars look fine, yet nothing loads. That points to a setting rather than coverage: the wrong data line, or data roaming off on the travel line. The order of checks is in do you need data roaming on for a travel eSIM and signal bars but no internet.

The name that warns you before the bill

Near some borders, a phone connects to whichever mast is strongest, and that may be across the line. The south of Spain facing Morocco, Gibraltar, and the Alps along the Swiss border are classic places for it. If the Network field or the name in Control Center shows a foreign operator while you are still at home or in an EU country, your usual line is roaming somewhere that may not follow EU roaming rules.

The welcome text message from your operator is the other clue, and the welcome SMS explained covers what it must say. For people who live near a border, accidental roaming near non-EU borders goes through the fixes.

A single-country travel pack gives a different signal: it works only in its own country, so if it shows a neighbouring network, it has no data there. That is covered in crossing a border with a country eSIM.

When one operator is weak where you are

Depending on the plan and the country, a travel eSIM may be allowed on more than one local network. If you are in a village, a valley or a building where the network you are on keeps dropping, knowing its name tells you which one to avoid. The list of alternatives is in the network selection screen: on an iPhone, Settings, Cellular, the line, Network Selection, then turn off Automatic; on a Pixel, Settings, Network and internet, SIMs, the SIM, then turn off Automatically select network. Google warns that the list can take up to two minutes to appear.

Pick another operator, wait and test with Wi-Fi off. If it works, write the name down, and turn automatic selection back on when you move, because a network chosen by hand does not let go by itself. The full method and its pitfalls are in manual vs automatic network selection.

What to send when you ask for help

Whoever helps you, your operator or the provider of your travel eSIM, can do much more with facts than with it does not work. Before you write, take a screenshot of Control Center on iPhone, or of the SIM status screen for that line on Android, with Wi-Fi turned off so the phone is showing its mobile connection.

Add where you are, the city or the area, and whether the problem is no signal at all or signal without data. The network name, the service state and the roaming field together usually say which of the two it is. If you use a Snoozim eSIM, those same details are what makes the reply quick, and the general checks before you write are in how to know if your eSIM is working.