Mauritania eSIM for Nouakchott, the iron-ore train, and the Sahara

Mauritania is a desert capital on the Atlantic, the longest train in the world, and the Sahara's caravan towns, and Nouakchott's arrivals hall is the place to have a phone that already works. The best eSIM for Mauritania is a Mauritania plan, added at home, on Wi-Fi, so the driver is found and the visa-on-arrival form is on the phone before the queue moves.

Below: how a Mauritania plan works, how to set it up before you fly, what to expect in Nouakchott, the coast, and the Adrar, and which plan fits for the rest of the route.

African itineraries change, and most travel eSIMs make you start over every time they do. KnowRoaming doesn't. You add the KnowRoaming eSIM, called KR.One, to your phone once, then add a plan per trip: Mauritania now, a regional plan for a later route through the countries it covers, and whatever comes next after that. Nothing to scan again, nothing to delete when you get home.

The plan's days start when you turn it on and connect in Mauritania, not at checkout. Buy it weeks ahead, add it at home, and a delayed flight costs you nothing. The full rule is in what plan validity means and when it starts.

Choose a fixed plan for a set amount of data at the lowest overall price, or an unlimited plan when you'd rather not count. Unlimited plans give you 5 GB a day at full speed, then a slower speed until the allowance resets the next day. If a fixed plan runs low, top up in the app and the extra data lands on the same eSIM.

See it in two minutes: Meet KR.One, iPhone setup with KR.One, or Samsung setup with KR.One.

Do this at home on Wi-Fi. It takes about a minute.

Before you leave

1. Get the KnowRoaming app (available on iOS and Android) and choose your Mauritania plan.
2. Tap Add. First time on this phone? The app adds KR.One and your Mauritania plan together. Already have KR.One? Only the plan is added, with nothing to scan.
3. Leave data roaming off on the KnowRoaming line until you land, and turn it off on your home line too so it doesn't run up charges in the background. Steps are in turning off roaming on your home line.

When you land

1. Turn the plan on in the app, then turn data roaming on for the KnowRoaming line. That setting lives in your phone, so the app can't flip it for you.
2. Give the phone a minute to find the network. If nothing happens, turn airplane mode on for 30 seconds and off again.

Prefer a QR code? The checkout page and your confirmation email both carry one; scan it from your phone's settings. Every tap, by device, is in adding your eSIM on iPhone, adding your eSIM on Android, and adding your eSIM on Samsung, or watch the iPhone QR walkthrough or the Samsung QR walkthrough. Still no signal after landing? Work through the no-signal checklist.

Nouakchott's airport is about half an hour from the center, and hotel and organization drivers meet the flights; a visa on arrival covers many passports. The ouguiya is the currency, cash is the rule outside a few hotels, and the ATMs are unreliable for foreign cards, so bring euros to change. The fish market at the Port de Pêche at sunset and the Grand Mosque are the capital's day; getting around is by taxi and arranged car.

The iron-ore train from Nouadhibou to Zouérat, ridden on top of the ore for 16 hours, the caravan towns of Chinguetti and Ouadane in the Adrar, and the Banc d'Arguin's birds are the country beyond, by long road with a driver and offline on any network beyond the towns; Mattel's 4G covers the capital, Nouadhibou, and Atar. Organizations posting staff issue their own guidance, which should be followed over anything on this page.

Mauritania is sold as its own plan and is not on the Africa plan, which covers Senegal, Morocco, and Algeria around it, or on the Global plan. The road south to Dakar crosses at Rosso or Diama into Senegal, on the Africa plan; the road north runs through Western Sahara to Morocco. Mali, to the east, is a separate plan. Read crossing into a border country your plan doesn't include before a route that leaves the plan's coverage.

Electricity in Nouakchott is mostly reliable and generator-backed at the hotels; in the interior it's the generator or nothing, so a power bank and a car charger keep the phone useful. The heat from April to October is severe, and mobile service can be slowed at short notice; keep offline copies of what matters.

For a posting measured in weeks or months, an unlimited plan, with 5 GB a day at full speed, covers daily video calls home and the hotspot for a laptop when the office or the guesthouse connection fails; a fixed plan suits a short mission. Top up or add a plan from the app while you have data or Wi-Fi, so before a trip out of town rather than during one.

Your plan connects to Mattel on 4G LTE. There is no 5G on this plan. Coverage is concentrated in Nouakchott, Nouadhibou, Atar, Rosso, and Kiffa and along the main road between the capital and the north. Your phone picks the network automatically once the plan is on; there is nothing to choose by hand.

Beyond the towns, expect gaps or no signal on any network for long stretches. Plan those legs as offline.

Most phones sold since 2019 support eSIM, including iPhone XS and later and most Android flagships from the same window. Check yours before you add a plan; it takes a few seconds. On iPhone, go to Settings, General, About and look for an EID or Available SIM. On Android, go to Settings, Network & Internet, SIMs and look for an option to add an eSIM. On Samsung, dial *#06# and look for an EID.

Your phone also needs to be carrier-unlocked. If you're not sure, carrier-locked vs unlocked: how to tell shows you where to look.

Adding a Mauritania plan doesn't touch your regular SIM. Calls and texts on your usual number keep working exactly as before. The new plan handles data while you're there, and most phones run both at once without you doing anything else. Bank codes and two-factor texts still arrive on your home number, as long as that line stays switched on.

For Africa the alternatives are a home-carrier roaming rate that is often not offered at all, a local SIM in each country with registration paperwork at each border, or lodge Wi-Fi that works in the bar and nowhere else. A Mauritania plan added at home beats all three: one price agreed before you fly, live the second you land, and the same eSIM, with a plan for wherever the next trip goes.

Real travelers rate KnowRoaming 4.5 out of 5 on Reviews.io. More than a decade in travel connectivity, more than 200 destinations, and support that doesn't clock off: WhatsApp and live chat, any time, any day.

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