This is as easy as pie! If you are a already a ZYM subscriber, you may buy a data roaming plan in ZYM Mobile App.

In ZYM Mobile app, go to Plan / Addon to buy a Data roaming plan of your choice

Take note
When you are buying a Data roaming plan, you shall be prompt to an option to activate the plan immediately or schedule an activation date based on your travel plan.

Need help?
Contact ZYM cuscare here

Available in ZYM Mobile App, our data-only roaming plans cover up to 81 destinations.

Check here the full list here

Need help?
Contact ZYM cuscare here

Yes! You must have a ZYM subscription in order to purchase a Data roaming add-on.

No, you won't.

To protect our subscribers from unexpected overseas data charges, ZYM has restricted mobile data usage outside Singapore network unless you have an active data roaming plan.

To get a Data roaming plan, go to ZYM Mobile App > Plan / Addon to buy a Data roaming plan of your choice

You definitely cannot use roaming data while overseas without a data roaming add-on.

However, selected ZYM subscription plans (i.e Roam Plus) is having sign up promo which includes a complimentary roaming data for specific countries.

Be sure to check your plan details or contact ZYM Mobile to confirm if your plan includes roaming data and for specific details on any limitations.

For more information, check our latest SIM-only plans in www.zym.sg

Check here the full list here

Alternatively, you may login to ZYM Mobile app to check them out.

Before you reach out to ZYM Customer care for assistance, a few basic self-troubleshooting may just do the trick.

👉 Is my device's Airplane Mode turned on?
👉 Have I turned on the Data Roaming Service on my device?
👉 Have I tried restarting / rebooting my device?
👉 Have I connect to a preferred network partner?
👉 Do I have a valid roaming addon plan?

To turn on/off data Roaming Service on my device
✅ iOS Device
Settings > Mobile Data > Network Selection > Turn off 'Automatic' > Select preferred network

✅ Android Device
Settings > Connections > Mobile Networks > Network Operators > Select Manually > Select preferred network

To know which preferred network to connect to for each destination
✅ Refer to here

Need help?
Contact ZYM cuscare here

For the best experience, refer to the list of Telco you should connect with after you bought ZYM's roaming add-on plan.

List of Telco to connect for ZYM mobile's data roaming
✅ Albani > One Telecommunications & Vodafone
✅ Argentina > Claro & Telefonica
✅ Armenia > VEON
✅ Australia > Optus, Telstra & TPG Telecom
✅ Austria > T-Mobile (Magenta Telekom), A1 Telekom & H3G
✅ Bangladesh > Airtel, Banglalink (Orascom Telecom) & Robi (Axiata)
✅ Belgium > Belgacom (Proximus) & Telenet
✅ Brunei > UNN
✅ Bulgaria > A1 Bulgaria & Telenor
✅ Burkina Faso > Orange
✅ Cambodia > Cellcard (CamGSM), Viettel(Metfone) & Smart Axiata
✅ Canada > Bell Mobility, Telus & Rogers Communications
✅ Chile > Entel PCS & Telefonica
✅ China > China Mobile & China Unicom
✅ Colombia > Claro (Comcel) & Telefonica
✅ Costa Rica > Telefonica
✅ Croatia > Croatian Telecom & A1
✅ Czech Republic > O2 Czech Republic & T-Mobile
✅ Denmark > Telia Danmark, Telenor & Nuuday (TDC)
✅ Ecuador > Conecel (Claro) & OTECEL (Telefonica)
✅ Egypt > Orange & Vodafone
✅ Estonia > Telia & Tele2 Eesti
✅ Fiji > Digicel & Vodafone
✅ Finland > Telia
✅ France > Orange France, Bouygues Telecom & SFR
✅ Germany > elekom Deutschland & Telefonica (E-Plus)
✅ Ghana > AirtelTigo & Vodafone
✅ Greece > Cosmote & WIND Hellas
✅ Hong Kong > HKT (CSL), China Mobile HK & Hutchison
✅ Hungary > Magyar Telekom (T-Mobile) & Vodafone
✅ Iceland > Siminn (Iceland Telecom) & Vodafone
✅ India > Bharti Airtel & Vodafone Idea
✅ Indonesia > Telkomsel & XL
✅ Ireland > Three Ireland & Vodafone Ireland
✅ Israel > Pelephone, Cellcom & Partner Communications
✅ Italy > TIM Italia, WIND & H3G Italy
✅ Japan > KDDI, Softbank Corp & NTT DoCoMo
✅ Jordan > Zain
✅ Kazakhstan > Kar-Tel (Beeline)
✅ Kenya > Airtel Kenya & Safaricom
✅ Kuwait > Zain KW
✅ Laos > Lao Telecom & Tplus Digital
✅ Latvia > LMT & Tele2
✅ Lithuania > Telia & UAB Bite Lietuva
✅ Luxembourg > Tango & POST Luxembourg
✅ Macau > CTM & Hutchison Telephone Macau
✅ Malaysia > DiGi Telecom & Celcom Axiata
✅ Mexico > Telcel, Movistar (Telefonica Moviles) & AT&T
✅ Mongolia > Unitel & Mobicom
✅ Myanmar > MPT & Ooredoo
✅ Netherlands > KPN & T-Mobile
✅ New Zealand > Spark NZ & Two Degrees
✅ Nigeria > Airtel Nigeria
✅ Norway > Telia & Telenor
✅ Pakistan > Jazz
✅ Panama > Cable & Wireless & Tigo
✅ Papua New Guinea > Bemobile & Digicel PNG
✅ Peru > Claro (America Movil Peru) & Telefonica
✅ Philippines > Globe Telecom & SMART Communications
✅ Poland > T-Mobile, P4 Poland & Polkomtel (Plus GSM)
✅ Portugal > MEO & Vodafone
✅ Qatar > Ooredoo & Vodafone
✅ Romania > Telekom Romania & Vodafone
✅ Russia > VimpelCom (Beeline), MTS (Mobile TeleSystems) & MegaFon
✅ Saudi Arabia > Mobily (Etihad Etisalat Company) & Saudi Telecom Company (STC)
✅ Slovak Republic > Slovak Telekom
✅ South Korea > SK Telecom & KT
✅ Spain > Telefonica (Movistar) & Xfera Moviles (Yoigo)
✅ Sri Lanka > Airtel Lanka, Mobitel & Dialog Axiata
✅ Sweden > Telia, Comviq (Tele 2), Telenor Sverige & Hi3G Access Sweden
✅ Switzerland > Swisscom, Sunrise & Salt Mobile
✅ Taiwan > Taiwan Mobile & Chunghwa Telecom
✅ Thailand > AIS (AWN), True Move & DTAC
✅ Timor-Leste > Telkomcel
✅ Turkey > Turkcell & Turk Telecom
✅ UAE > Etisalat & du
✅ UK > Telefonica O2, Everything Everywhere & H3G UK
✅ Ukraine > Kyivstar & Lifecell
✅ USA > AT&T, Verizon Wireless & T-Mobile USA
✅ Uzbekistan > Unitel
✅ Vietnam > MobiFone, VNPT-I (Vinaphone) & Viettel Mobile