The Expat Relocation Connectivity Checklist

Most “moving abroad” checklists treat connectivity as a single line item: get a local SIM. That undersells how many separate deadlines are actually involved. Miss one, and you’re not just without data — you can lose access to your own bank account. This checklist works through the actual phases, in order, with the deadlines that matter at each one.

Before You Leave: The 2FA Trap Almost Everyone Falls Into

Here’s the scenario that catches new expats hardest. You land, settle in, and go to pay rent from your home bank account. The bank texts a verification code to your home number. Your home SIM isn’t active anymore. You’re locked out of your own money.

The usual fix people reach for is a free VoIP number like Google Voice. It works for plenty of services — Venmo, PayPal, and similar apps generally accept it. It does not work everywhere. NIST’s own security guidance explicitly discourages VoIP numbers for authentication. ID.me, used by the IRS, states outright that it doesn’t accept VoIP numbers. Bank of America’s Zelle and Wells Fargo both reject them too.

The safer fix comes before you leave, while you still have full account access. Switch every account you can to an authenticator app instead of SMS codes. Google Authenticator and Authy both generate codes offline, with no dependence on any phone number at all. Some accounts only support SMS and won’t budge. For those, decide in advance whether you’ll keep a cheap real SIM active back home. Plans from providers like US Mobile run as low as $6 to $7 a month, purely to keep that number alive for verification texts.

Checklist:

• Audit every account that uses SMS-based two-factor authentication
• Switch to an authenticator app everywhere that option exists
• For banks that only support SMS, confirm whether they accept VoIP numbers before relying on one
• If needed, keep a low-cost home SIM active purely for verification texts

Your Home Carrier Will Eventually Cut You Off — Know When

Roaming on your home SIM feels like a fine bridge solution, until it quietly stops working. Every major carrier has a fair-use limit built in specifically to catch people who’ve stopped traveling and started living abroad.

In the EU, “Roam Like at Home” monitors usage over a rolling four-month window. If you’re spending more time abroad than at home, and your roaming use exceeds your domestic use, your carrier can flag the account. You’ll typically get 14 days to clarify before surcharges apply. In the UK, O2 applies scrutiny around 63 days in the EU zone. EE issues warnings around the 60-day mark. In the US, Google Fi users have reported data roaming cutting off close to the 90-day mark. It’s consistent enough to be a known pattern, not a one-off glitch. T-Mobile has similarly flagged and suspended accounts after extended time away from the US.

None of this happens on day one. That’s exactly why it catches people off guard. The SIM works fine for the first month or two, then quietly stops.

Checklist:

• Check your specific home carrier’s fair-use or extended-roaming policy before you leave
• Mark an approximate cutoff date on your calendar based on that policy
• Don’t treat home-SIM roaming as a permanent solution — it’s a bridge, not a destination

Week One: Bridging the Gap Before You’re “Local”

Here’s a gap most checklists skip entirely. You can’t always walk into a shop and get a proper local SIM the day you land. Many countries tie full SIM registration to visa or residence-permit status. That paperwork itself can take weeks after arrival.

This is where a travel eSIM earns its place, even for someone relocating rather than just visiting. Installed before departure, it’s already working the moment you land. No store to find. No queue to stand in with your luggage while you’re also trying to find an apartment. Our destination eSIM plans cover 160+ countries for exactly this bridge period. Our what is an eSIM page covers the basics if you haven’t used one before.

Checklist:

• Install a destination eSIM before departure, not after arrival
• Use it as your primary data line for the first weeks, while local SIM registration is still pending
• Don’t assume a proper local SIM will be available immediately — plan for a gap

The Local SIM Timing Trap: Registration Tied to Visa Status

This is the part that trips up long-term movers specifically, as opposed to short-term travelers. In several countries, how long your local SIM stays active depends directly on your visa status. Not just whether you keep topping it up.

In the Philippines, a tourist-registered SIM automatically deactivates after 30 days. You need proof of an approved visa extension to keep it running. In Turkey, a SIM registered on a tourist e-visa lasts only three months. One registered against an actual residence permit stays active indefinitely, as long as you use it at least once every six months. The UAE requires an Emirates ID or residence visa for anything beyond a short-term visitor line. In each case, the SIM you buy in week one isn’t the SIM you’ll be using in month four.

The practical implication: don’t treat your first local SIM as permanent. Expect to re-register once your residence permit or long-term visa comes through. Budget the paperwork time for that into your plans.

Checklist:

• Check whether your destination ties SIM validity to visa status before assuming it’s permanent
• Keep passport, visa, and (once issued) residence permit accessible for SIM re-registration
• Re-register your local SIM under permit status as soon as it’s available, rather than waiting for the tourist registration to lapse

The Full Timeline, Start to Finish

30 days before departure: audit SMS-based 2FA across your accounts, switch what you can to authenticator apps, decide on a home-number strategy for anything that won’t budge, and install your destination eSIM.

Arrival week: run on the destination eSIM while starting visa or residence paperwork. Note your home carrier’s approximate roaming cutoff date.

First 90 days: watch the roaming fair-use window on your home SIM. Register for a local SIM under whatever tourist-tier registration is available, knowing it may be temporary.

After your residence permit comes through: re-register your local SIM under permanent status. Decide the long-term fate of your home number — a minimal-cost plan kept alive purely for verification texts, or a full migration to authenticator apps plus your new local number.

FAQ

Can I just roam on my home phone plan indefinitely as an expat?

No. Every major carrier has a fair-use or extended-roaming policy. It eventually flags or cuts off accounts that are living abroad rather than traveling. The exact trigger varies by carrier, but none of them are built for permanent use.

Will my bank’s two-factor authentication still work once I leave my home country?

It depends on the bank and the number type. Several major US institutions, along with the IRS’s ID.me system, explicitly reject VoIP numbers for verification. Switching to an authenticator app before you leave is the most reliable fix.

Do I need a residence permit before I can get a local SIM number?

Not always immediately. Many countries allow tourist-tier SIM registration on just a passport. But that registration is often temporary, tied to your visa status, and expires or requires re-registration once your status changes.

What should I use for connectivity in the gap before I have a proper local SIM?

A travel eSIM installed before departure is the most reliable bridge. It’s active from the moment you land, regardless of how long local SIM registration or residence paperwork takes.