eSIM adoption is accelerating globally—but physical SIM cards still dominate the installed base, creating a real inventory question for retailers and wholesalers. Your stocking decision isn't binary; it's about understanding which products your customer base will actually buy and where margins work.
The Market Reality Right Now
Physical SIM cards remain the standard for 2–3 billion devices worldwide, especially in emerging markets, older phones, and non-smartphone IoT devices. eSIM, meanwhile, is growing fast in flagships (iPhone 15+, Samsung Galaxy S24, new Pixels) and is now mandatory in some EU regulations for new devices from 2025 onward. Neither is going away; both will coexist for at least 5–10 years.
For your business, that means inventory strategy matters more than choosing sides.
Physical SIM: Stable Demand, Reliable Margins
Physical SIM cards still account for the majority of carrier activations in most regions. Here's why stocking them makes sense:
- Lower barrier to entry. Customers don't need compatible devices; nearly every phone works.
- Easier support. Activation and troubleshooting are straightforward for staff and customers.
- Wholesale margins. Typical wholesale cost ranges $0.50–$1.50 per card; retail markup of 100–300% is standard depending on your market and carrier partnerships.
- Emerging market strength. Africa, Southeast Asia, and Latin America will drive physical SIM demand for years.
- IoT and automotive. M2M SIM cards for connected devices, trackers, and industrial IoT remain predominantly physical.
The catch: Physical SIM inventory requires storage space, management of multiple carrier variants, and eventual slow-moving stock if adoption shifts too fast.
eSIM: High Growth, Higher Complexity
eSIM appeal is real—no physical card, instant provisioning, seamless multi-network switching—but selling it involves more friction:
- Device compatibility is the gatekeeper. Only newer phones, smartwatches, tablets, and laptops support eSIM. Your customer pool must actually have compatible devices.
- Carrier restrictions vary wildly. Some carriers restrict eSIM to postpaid plans; others require in-store activation or proof of identity. Others don't support it at all.
- Higher price point. eSIM profiles cost more than physical SIM cards to provision—expect $8–$25 per activation depending on the provider and whether it's postpaid or prepaid.
- Faster margin potential. The lower physical footprint and higher service value mean better per-unit profit, but lower transaction volume in most markets today.
- Regulatory tailwind. EU mandate and Apple's direction will push adoption, especially in developed markets.
The business reality: eSIM margins are better per sale, but you need customers with compatible devices and access to carrier platforms that support it.
Stocking Strategy: A Hybrid Approach
Most successful retailers don't pick one. Here's a practical framework:
Start with your customer mix. If you're selling prepaid SIM cards to budget-conscious or emerging-market customers, physical SIM is your core. If you serve tech-forward urban professionals or businesses with mobile workforces, eSIM becomes essential.
Stock physical SIM at 70–80% of your inventory and dedicate 20–30% to eSIM. This ratio shifts over 2–3 years as devices penetrate. Review quarterly and adjust based on actual sell-through data.
Choose 2–3 carrier partnerships rather than attempting every option. Limit physical variants to top carriers in your region and simplify fulfillment. For eSIM, secure direct APIs or reseller agreements with at least one major carrier to reduce friction.
Bundle services, not just cards. Position yourself as someone who solves connectivity problems—sell physical SIM cards as the reliable backbone and eSIM as the premium, hassle-free upgrade. This narrative protects margins and builds loyalty.
Listing Your Inventory on Marketplaces
List both product lines where your customers hunt. Whether you're selling bulk SIM card packs, eSIM profiles, or both, getting found by the right buyers matters—platforms like Mercoly help you reach businesses and resellers looking for reliable suppliers in the SIM and eSIM category, win consistent leads, and scale your sales without managing logistics alone.
Frequently Asked Questions
Q: When will physical SIM cards become obsolete? Not for 5–10+ years. Even with eSIM growth, billions of existing phones and IoT devices rely on physical cards, especially outside developed markets.
Q: What margins should I expect on eSIM activations? Margins range from 20–50% depending on carrier agreements, volume, and prepaid vs. postpaid mix. Physical SIM typically runs 30–60%.
Q: Do I need regulatory approval to resell eSIM? Requirements vary by carrier and region. Work directly with your carrier partner to confirm compliance; most require basic business registration and carrier-specific reseller agreements.
Start by auditing your current customer base and their device types—your inventory decision flows directly from who you're actually serving.