Before you start

An unlocked handset, or an eSIM-capable one
A US address for postpaid, but not for prepaid
A payment method — prepaid accepts foreign cards, postpaid usually does not
Wireless Emergency Alerts left switched on

Step-by-step

1
Activate a US eSIM before you fly, or buy prepaid on landing
An eSIM bought before departure means you land with a working US number, which matters because banks, the licence office and rental applications all send SMS codes. No identity registration is required at any point in the US.
Mobile appWho: YouDay 1
2
Check your handset is unlocked and band-compatible
Handsets bought on contract abroad are frequently carrier-locked, and some regional models miss US band combinations. With 3G shut down there is no fallback network. Run your exact model through the carrier's compatibility tool.
OnlineWho: You
3
Start prepaid rather than fighting a credit check
Postpaid runs a credit check and a newcomer with no file is declined or asked for a deposit of several hundred dollars. Prepaid has no check, no contract and is usually cheaper for the same data on the same towers.
OnlineWho: You
4
Leave Wireless Emergency Alerts on, and add a NOAA weather radio
This is the Wichita-specific step. Federal Wireless Emergency Alerts carry tornado warnings, and they are the layer that reaches you indoors and asleep — the county's outdoor sirens are engineered to be heard outside, not through a closed bedroom window. A NOAA weather radio with a battery backup adds a channel that works when the power and the mobile network do not. Set both up in March, not in May.
Mobile appWho: YouBefore spring
5
Check broadband by address before you sign a lease
Run the exact street address through the FCC's National Broadband Map and confirm with the provider. Wichita is a low-density metro with a lot of post-war single-family stock, and fibre build-out is genuinely uneven across it — a house two streets over can have a different set of options entirely.
OnlineWho: YouBefore signing
6
Plan for storm power cuts if you work from home
Straight-line winds and ice storms take lines down across south-central Kansas most years, and a rural or edge-of-metro address can be out for a day or more. A charged power bank, a mobile hotspot allowance and knowing which nearby library or café keeps power are the standard local preparations for anyone whose income depends on being online.
Mobile appWho: You

Documents you’ll need

Passport for postpaid; nothing at all for prepaid
US address for postpaid and for home internet
A payment card — prepaid usually accepts foreign cards, postpaid rarely does

Things most newcomers don’t know

Your phone is the tornado warning that works at night.

Newcomers assume the outdoor sirens are the alerting system. They are not — they are engineered to warn people who are outdoors, and a closed, insulated bedroom window at 2 a.m. defeats them. Wireless Emergency Alerts and a NOAA weather radio are what reach you where you sleep. Every spring, the people caught out are the ones who switched the alerts off because a flash-flood warning woke them once.

Source: FCC — wireless emergency alerts

The US has no SIM registration of any kind.

Most countries in this app require passport registration to activate a SIM and several require biometrics. The US requires nothing at all for prepaid — you can buy one with cash and never give a name. Arriving from India, Nigeria or the Gulf, the total absence of paperwork reads like an oversight. It is deliberate.

Source: community-reported

The credit check is the barrier to postpaid, not the paperwork.

Carriers screen credit before offering a postpaid plan, and a newcomer with no file is declined or charged a deposit of a few hundred dollars. Nobody at the counter explains that prepaid avoids the check entirely, runs on the same towers, costs less, and converts to postpaid later once you have history.

Source: community-reported

Your number is portable, which makes the cheap-first strategy work.

Federal rules require carriers to release your number to a competitor, and you keep it moving prepaid to postpaid or back. That is what makes the sensible sequence possible — a cheap prepaid line for six months while you build credit, then a postpaid plan — without having to re-give a new number to every bank, employer and landlord that already has one on file.

Source: FCC — porting your phone number

Common mistakes to avoid

Switching off Wireless Emergency Alerts and relying on outdoor sirens during storm season.
Signing a work-from-home lease without checking what broadband reaches that specific address.
Bringing a carrier-locked handset and discovering it after landing.
Taking a postpaid contract with a large deposit in month one when prepaid runs on the same towers.
Relying on a foreign number for bank and licence-office SMS verification.

Some of this may be out of date. Spotted something inaccurate? Help us keep it right for the next newcomer.