United Kingdom
United States
Spain
Morocco
Turkey
Tunisia
Thailand
Landing in a new country with working data is only half the battle. In some destinations WhatsApp calls simply do not connect, in others your phone can be blocked from the network after a set number of days, and in a few your favourite apps are filtered altogether. None of this is obvious until it happens to you, usually at the worst possible moment.
This guide walks through the countries where travellers most often get caught out, what actually happens on the ground, and how to prepare before you fly. If you just need data for your trip, you can browse plans for 180+ countries on the SimplySim destinations page.
United Arab Emirates: WhatsApp and FaceTime Calls Do Not Work
This is the one that surprises the most people. In the UAE (Dubai and Abu Dhabi included), regulators restrict Voice over IP services. WhatsApp messaging works normally, but WhatsApp voice and video calls, FaceTime calls and Skype calls are blocked on local networks.
What to do about it:
- Warn family before you go that WhatsApp calls will not connect reliably
- Locally licensed apps such as Botim are the approved alternative for video calls
- Messaging, email, maps and social media all work as normal
- Hotel WiFi is subject to the same restrictions, so this is not a SIM problem you can swap your way out of
China: The Great Firewall and Why Your eSIM Choice Matters More Here Than Anywhere
On Chinese local networks, Google services, WhatsApp, Instagram, Facebook and many Western news sites are filtered. Tourists on local SIM cards often discover that Gmail and Google Maps simply do not load.
Here is the useful part: travel eSIMs generally route your traffic through networks outside mainland China, because technically your data session breaks out in another country. In practice this means many travellers on international travel eSIMs find their usual apps work in China without any extra setup. This behaviour is widely relied upon but never officially guaranteed, so if uninterrupted access is critical for your trip, have a backup plan and download offline maps before you arrive.
- Download offline Google Maps areas and translation packs before departure
- Set up any essential accounts before you land, not after
- Expect hotel WiFi to be filtered even when your eSIM data is not
Turkey: The 90-Day Phone Registration Rule
Turkey requires foreign phones staying in the country long term to be registered, and registration involves a significant fee. Unregistered phones can be blocked from Turkish networks after the permitted period. Holidaymakers on normal trips are unaffected, but people staying for months, working remotely or visiting family for a whole summer need to know the clock exists.
- Short trips: nothing to do, use your eSIM and enjoy your holiday
- Long stays: read the full detail on our Turkey eSIM restrictions page before you travel
- Plans for Turkey start at £1.48 on the Turkey destination page
Egypt: Phone Import Tax on Long Stays
Egypt links foreign handsets to an import tax system. Visitors get a grace period, but phones that stay in the country beyond it and connect to local networks with local SIMs can trigger a registration requirement and a tax bill that can run to a large percentage of the phone's value. A travel eSIM bought before you arrive keeps things simple for normal tourist stays. We cover this in depth in our Egypt guide in the articles section, which remains our most-read article for good reason.
Russia and Belarus: Check Before You Rely on Anything
Coverage, payment processing and app availability all shift with sanctions and local regulation. If your travel takes you here, check your provider's current coverage list rather than assuming a global plan includes these countries. Many do not.
India: SIM Rules Built Around Local Identity Checks
Buying a local SIM in India involves identity verification designed for residents, and tourist SIM counters at airports involve queues and paperwork. This is a country where an eSIM purchased before departure saves real time on arrival. Your data works from the moment you land, with no documents handed over at a kiosk.
The Pattern: Sort Your Connectivity Before You Fly
Every rule above is easier to handle from your sofa than from an airport queue. The same preparation covers you in every case:
- Buy and install your eSIM before departure so data works on landing
- Download offline maps and translation files for anywhere with filtering
- Know your stay length and whether registration rules apply to you
- Keep your UK SIM active for calls, texts and bank verification
- Check the exact coverage list for your plan on the global network coverage checker
Final Thoughts
Most connectivity surprises abroad are avoidable with ten minutes of preparation. Know whether your destination restricts calls or apps, know whether a long stay triggers registration rules, and land with a working eSIM already installed. Browse plans for your destination on the SimplySim destinations page.
