Best eSIM for Italy: Keep the Number, Not the Roaming

The short answer: keep your US number, not its roaming

• The setup: a data-only travel eSIM, installed at home over Wi-Fi, carries your data, and your US line stays on with Data Roaming off, so the bank's texts still reach you.
• The eSIM: Saily. Its Italy plans start at $3.99 for 1 GB over 7 days (October 2026), data only, with no hotspot restrictions. Its optional phone number is a US one.
• The trap: on a Verizon line with TravelPass on, or an eligible AT&T line with the International Day Pass, making or answering a call or sending a text starts a day fee (AT&T caps how many per bill cycle), so call home over data. Fees and the background-data catch: next section.
• Skip the eSIM if your T-Mobile plan already includes enough high-speed roaming data, or if you need an Italian number: TIM Tourist, €14.99 for 30 days plus a €10 SIM.

The best eSIM setup for Italy is two lines with two jobs: a data-only travel eSIM carries your data, and your US line stays on, with its Data Roaming turned off, so the bank's texts can reach you. That switch only takes the home line off cellular data. On a Verizon TravelPass or AT&T Day Pass line, a day fee can still start (the next section's table shows how), so calls home go over data: FaceTime or WhatsApp.

The price is no Italian number, and the section on your number covers who needs one. I'd still rather pay for a second eSIM for data than for the carrier's travel rate, and when it works, it is an easy install with nothing more to think about.

Is your US phone plan enough in Italy? Verizon, AT&T, T-Mobile

On a Verizon line with TravelPass on, or an eligible AT&T line with the International Day Pass, using the phone in Italy starts a daily fee, and AT&T caps how many it charges per bill cycle (amounts below).

As of October 2026, Verizon's TravelPass page names Italy as a TravelPass country, and Italy is on AT&T's Day Pass list and T-Mobile's included-roaming list. The terms follow the line, not just the carrier.

AT&T does not wait to be asked. On an eligible consumer postpaid line with no international feature, it adds the Day Pass by itself when you use a compatible phone in Italy, texts to say so, offers an opt-out right then, and keeps the pass on until you remove it. Read that text. A Verizon line without TravelPass is billed at Pay as You Go rates.

On T-Mobile, look up what your own plan gets in Italy on its roaming benefits page before buying anything else. For more data, or on Essentials, add an International Pass on a qualifying postpaid plan with a capable phone: 15 GB for 10 days at $50 or 30 GB for 30 days at $75, taxes additional, each with unlimited calling. If your plan already covers the trip's data, skip the eSIM: one line, bank texts and all, nothing to install.

Which eSIM for Italy: Saily, Yesim, Holafly, or Airalo

For an eSIM for Italy, I'd pick Saily, for its range of plan sizes and its hotspot terms. Still, the best eSIM for Italy comes down to plan shape more than brand.

An Italy eSIM with unlimited data can still have limits: Saily's runs 5 GB a day at full speed, then up to 1 Mbps, and Holafly may slow you down in rare cases, for no more than a day. Saily's Switzerland plan works only in Switzerland. For an eSIM for Italy and Switzerland, Saily recommends its Europe plan, from $4.99 for 1 GB over 7 days. Holafly's 33-country Europe plan lists both too.

Match the Saily row to your shape: metered if you know your usage, unlimited if a hotspot or streaming would outrun a fixed amount. It is data only; its optional number is a US one. It does not work for everyone: a failure can be the app itself, refusing to work on Wi-Fi or cellular.

My own setup in Italy is a travel eSIM, installed through its app before I fly: no time lost in a phone shop, no ID at a counter, no cards to swap. Roaming on my home plan costs too much once maps and navigation run all day, and the eSIM starts working the moment the plane lands, with fast data that has stayed steady.

For a one-day stop, Yesim's 1-day unlimited plan fits, and its longer unlimited plans cost less per day. The reservation: Yesim's reception in Italy can be poor.

Holafly gives you up to 6 months to request a refund (conditions apply). Airalo can work fine in Italy, and it can also fail to switch networks there; the landing section has the fix.

Apps use data in the background even when you're not looking. Turning on Low Data Mode for the eSIM line (Settings > Cellular > the eSIM) typically turns off Background App Refresh and iCloud Photos updates. How long a plan lasts depends on your phone's habits as much as on yours.

Your number in Italy: bank texts, calls, WhatsApp, an Italian SIM

Holafly, Yesim, and Saily, the three Italy eSIMs in the table above, give you no Italian number.

The bank's code is the text that matters, and the answer is pleasantly dull: with both lines on, each number sends and receives SMS, so the code arrives on your US number. Whether receiving it costs anything depends on the line:

• AT&T, eligible Day Pass line: received texts are rated as domestic and do not trigger the daily fee.
• T-Mobile, qualifying plan: unlimited texting in 215+ countries and destinations.
• Verizon, TravelPass on: the TravelPass page is silent on received texts, so ask Verizon.

Sending one, or making or answering a call, is another matter: on a Verizon TravelPass or eligible AT&T Day Pass line, the US-plan table two sections up shows what each starts. Apple's own warning for keeping both lines on: "You might still incur roaming fees from your home eSIM." One catch: while data roaming is on for the eSIM, your US line loses MMS and Visual Voicemail; iMessage and FaceTime keep working on it.

On T-Mobile, a call can cost you without being answered: if the phone is on, an incoming call is charged one minute even when it goes to voicemail. With the phone off, there's no charge.

WhatsApp keeps working on your US number even with a local SIM, but re-verifying the account needs the US SIM in the phone, with phone or SMS service on, so don't switch WhatsApp to a new number.

For a second number, Saily sells one as an add-on: a US-based number at $1.99 a month, call and SMS plans from $0.99, ID check required. Italy is on its voice-call list, so you can make and receive calls on it while you're there; minutes count both ways, and callers may pay international rates to reach a US number, depending on their carrier. Some services may flag it as an internet (VoIP) number, which can occasionally affect verification codes, so keep the bank's codes on your regular number.

If your trip runs on calls to restaurants, taxis, and hosts in Italy, get an Italian number. TIM Tourist is for new customers: €14.99 for 30 days from activation (October 2026), 200 GB in 5G ULTRA with 23 GB of it also usable in EU countries, unlimited minutes for calls within Italy, and 100 minutes for international calls, plus €10 for the SIM, with free activation. It does not renew by itself, and when the gigabytes run out, data in Italy stops rather than billing on. At a TIM store, ask for TIM Tourist by name.

Before you fly: an unlocked phone, and when to install the eSIM

An iPhone takes an Italy eSIM if it is an XS, XR, or later and not locked to your carrier. Apple's check: under Settings > General > About, "No SIM Restrictions" next to Carrier Lock means it is unlocked.

Every Pixel from the 4 on works with eSIM; other phones depend on the model and the carrier. Verizon unlocks a phone bought at full price automatically and a financed one once it is paid off. If a Verizon Gift Card pays for the phone or its balance, unlocking is delayed 35 days. Prepaid phones wait for 365 days of paid, active service. A phone reported lost or stolen stays locked until it is cleared. On AT&T or T-Mobile, ask your carrier.

Install the eSIM at home over Wi-Fi before you fly: Apple says your iPhone "must be connected to a Wi-Fi network or hotspot" (eSIM-only models can skip that in some countries or regions). Nobody wants a 7-day plan spending day one at the kitchen table, and when the clock starts depends on the plan:

• Saily: starts automatically when you arrive.
• Holafly: activates on connecting to any supported network, and works only once you arrive.
• Yesim: validity begins on connection to a compatible network; activate within 180 days of purchase.
• Airalo: for most packages, on connection to a supported network; some start at installation, so check the package's Validity Policy.

Use the eSIM's own app for the install, not the manual steps; that is where setups get complicated. If it won't connect when you land, the next section has the steps.

When you land: the settings, weak signal, the mountains

When you land in Italy, on an iPhone:

• Cellular Data: in Settings > Cellular, choose the travel eSIM.
• Your US line: tap it, then Cellular Data Options, and turn Data Roaming off.
• The eSIM line: Data Roaming as its setup asks: on for Saily; for Airalo, "as instructed in your Airalo app."
• Allow Cellular Data Switching: off. Left on, the iPhone can use cellular data from both plans; Airalo's steps turn it off.
• An eligible AT&T line: AT&T's own advice against unintended Day Pass use is to turn off cellular data roaming and Wi-Fi calling.

In Italy, a phone does not always find a network by itself, or keep it. First, try one of Apple's own steps for roaming trouble: turn on Airplane Mode for about 30 seconds, then off again, and let the iPhone pick the best network itself. Still nothing? Airalo's fix is manual: Settings > Cellular > the eSIM > Network Selection, Automatic off, then the network its app names. With another eSIM, follow that app's network instruction.

Each plan rides specific Italian networks: Holafly uses Vodafone and WINDTRE, Airalo WINDTRE, Vodafone, and Iliad. Before you go, check an address on AGCOM's Broadband Map, the Italian regulator's coverage map, in its mobile-network layer. For a mountain valley, LTE Italy, a private project, maps each carrier's LTE towers; a tower is not a promise of signal.

Holafly itself says coverage may be weaker or less stable at certain points in the Dolomites. Before a mountain day, download the area in Google Maps on Wi-Fi, and keep it updated, since downloads expire. Offline, walking, transit, and bicycling directions are gone, and driving directions work only while the whole route stays inside the area, without traffic info or alternate routes. A phone can work fine in mountain Italy; for the bend where it doesn't, keep the offline map alive with a charged battery pack.

I've lost signal completely on high stretches of trail in the Dolomites and in the steep ravines between the cliffs of the Amalfi Coast. Ferry tickets and bookings live on my phone as screenshots or PDFs, and in a mountain hut with no signal, I've used the hut's satellite Wi-Fi or put the phone away until I reached an open pass.

FAQ