Before you start

Passport plus visa for a visitor line, or a resident card for a resident line
An unlocked handset
Your physical presence at an operator store for identity verification
For postpaid: a resident card and usually a salary certificate or bank account

Step-by-step

1
Buy a prepaid line on arrival
Omantel, Ooredoo and Vodafone Oman all have stores across Muscat and desks at Muscat International. A prepaid line activates on a passport in one visit. Use official stores rather than informal resellers — a line not registered to you causes problems that cannot be unwound later.
In personWho: You, with an operator agent15–30 minutesStarter packs are inexpensive
2
Move the line onto the resident card
Once the card is issued, transfer the registration. Bank verification, government portals and payment apps all send codes to the number held against your identity, and a mismatch produces failures that never name the phone as the cause.
In personWho: YouSame week as the resident cardFree
3
Switch to postpaid once salary is flowing
Postpaid bundles are better value at real usage levels and typically include generous data. They require the resident card and usually a salary certificate. Number portability between operators is available.
In personWho: YouMonth twoPlan-dependent
4
Arrange home broadband against the tenancy
Fibre is available across much of the Muscat strip but is uneven in older villas and in outlying areas. Ask what is actually terminated in your building rather than relying on a coverage map. Fixed wireless is a real alternative in villa districts.
In personWho: YouDays to two weeksInstallation plus monthly plan
5
Download offline maps before you leave the capital
Coverage on the mountain roads, in the wadis and along the coast away from the strip is patchy to absent. Download offline maps for anywhere you plan to drive or hike, and do not assume a live route will follow you into the interior.
Mobile appWho: YouBefore every trip out of the cityFree
6
Consider a satellite messenger if you hike or dive seriously
For regular mountain or offshore activity, a satellite communicator is a reasonable purchase in Oman in a way it is not in most Gulf countries — the terrain is genuinely remote and phone coverage genuinely stops.
OnlineWho: YouBefore serious tripsDevice plus subscription

Documents you’ll need

Passport with valid visa (visitor) or resident card (resident)
Unlocked handset
Tenancy contract for fixed broadband
Salary certificate or bank details for postpaid

Things most newcomers don’t know

Mobile coverage stops where Oman gets interesting, and that is a safety issue.

The Muscat strip and the main highways are well covered. Wadi floors are steep-sided rock canyons and signal simply does not reach them; mountain roads and remote coast are similar. Since wadis and mountains are precisely where people spend their weekends here, the practical consequence is that you can be an hour from the capital and completely uncontactable. Leave a route and a return time with someone, carry offline maps, and treat coverage as absent outside the strip until proven otherwise.

Source: Local coverage experience; ROP search and rescue guidance

The line has to be on your resident card, because that is your identity everywhere else.

Omani banking, government portals and payment apps verify by sending a code to the number registered against your identity. A line still held on your passport, or on an agent's or colleague's name, breaks those flows — and the failure messages talk about your account, never about your phone. Migrating the registration is a short errand that prevents a category of problem that is very hard to diagnose.

Source: TRA registration requirements

Fibre availability is a building question, and villa districts are the weak spot.

Muscat's low-rise, spread-out form means a lot of housing is villas rather than towers, and fibre has been laid unevenly across them. An operator's area coverage map will say yes; whether the fibre is terminated at your specific villa is a different question, and fixed wireless is often the actual answer. If you intend to work from home, confirm what is physically installed before signing the lease, ideally by asking a neighbour what they really get.

Source: Local network practice; TRA

Offline maps are not optional here in the way they are in a Gulf city.

Navigation apps in Dubai or Doha degrade gracefully because you are always near a road you know. In Oman a wrong turn on a graded track in the interior with no signal and no offline map is a genuinely serious situation, and the terrain does not forgive improvisation. Download the region before every trip out of the capital, and carry a paper backup for the interior. This is standard practice among Omani residents, not excessive caution.

Source: Local driving practice