Yettel eSIM Serbia 
Can I install multiple eSIMs on the same phone?
Yes. Modern iPhones and Android devices support multiple eSIM profiles - typically 5 to 8 stored profiles, with 1 or 2 active simultaneously. You can install eSIMs for different countries and switch between them in settings without removing any.
How can I purchase the Serbia eSIM?
You can purchase your eSIM directly from the eSIMno website - select a Serbia plan and complete the payment. Within minutes you'll receive an order confirmation email that contains everything you need to install: a QR code, a one-tap install link, the SM-DP+ address and activation code, plus an "Install eSIM" button. You can install straight from that email, or sign in anytime and go to Profile > My eSIMs > Install to get the same options.
What makes eSIMno different from other eSIM services?
eSIMno offers eSIM plans for 170+ countries on reliable local partner networks. The price at checkout is all you pay - no activation fee or roaming surcharge. Your eSIM arrives by email within minutes and only starts when it connects to a network at your destination; most plans can be topped up in Profile > My eSIMs, and if you haven't installed your eSIM, you can get a refund within 14 days.
Can I install my eSIM before traveling?
Yes - setting it up before your trip is the easiest approach. Your confirmation email contains the QR code, a one-tap install link and the manual SM-DP+ / activation codes (the same options are also available via sign in > Profile > My eSIMs > Install). While on Wi-Fi at home, install it with the one-tap link on your phone, or - to use the QR - show it on another screen or a printout and scan it with the phone you are setting up (not another phone). Installing does not start your plan: the validity countdown only begins when the eSIM connects to a mobile network inside your plan's coverage area. While you are outside that area, the eSIMno line and its Data Roaming can stay on - the eSIM cannot connect there, so nothing starts; just keep mobile data on your main line until then. On arrival, set mobile data to the eSIMno line and turn off Data Roaming on your main line so your carrier does not charge roaming fees. Important: if your plan also covers the country you are in right now, turning the line and Data Roaming on starts it immediately - leave both switched off until you want to use it. Please note: once installed, an eSIM is considered used and is no longer eligible for a refund.When Should I Set Up My eSIM?
Can I keep my WhatsApp number while using an eSIM?
Yes. Your WhatsApp number stays linked to your home SIM, so all your chats, contacts, and groups remain unchanged. WhatsApp uses data (not the SIM line directly) for messages and calls, so it works seamlessly over your eSIMno data.
What happens when my voice or unlimited plan ends? Can I renew it?
These plans cannot be topped up or renewed. Once the allowance is used or the validity period ends, the line closes. To keep going you buy a new plan, and that gives you a new eSIM to install - on a voice plan it also gives you a new phone number. This is how our supplier provides voice and unlimited plans, so we would rather tell you up front than let you expect an automatic renewal that will not happen. We never renew these plans and charge you without asking.
When should I set up my eSIM?
A Wi-Fi connection is required to install your eSIM, so we recommend setting it up before you leave home. Activation can happen later, either right before departure or after you land at your destination - but the initial QR scan needs Wi-Fi.
Will my own number still work while I use the eSIM?
Yes, if you want it to. As long as your main line stays switched on, your own number keeps working while the eSIM handles your mobile data. But abroad, your mobile operator usually charges roaming fees for calls and texts on that number, even for calls you answer. If you don't need your number during the trip, turn off your main line in your phone's SIM settings to avoid these fees. We don't recommend making or answering regular calls on your own number abroad; call over the internet instead, with apps like WhatsApp or FaceTime, using your eSIM data. If you need a code by SMS, for example from your bank, you can switch the line back on for a moment.
What network speeds can I expect?
Most eSIMno plans connect at 4G/LTE or 5G speeds depending on local network availability and your device's capabilities. Speed varies by location, network congestion, and signal strength. In major cities and tourist areas, expect speeds comparable to local mobile carriers.
Can I get a refund after purchase?
Refunds are not available once an eSIM has been installed or activated - install codes are one-time-use, so an installed eSIM is considered used even if no data has been consumed. If you have not installed your eSIM yet, you can get a refund within 14 days of purchase without giving a reason - just contact support with your order. We recommend reviewing plan details carefully before purchase to avoid any issues.Refund policy
How do I top up my Serbia eSIM?
To top up your Serbia eSIM data, sign in on our website or mobile app and go to Profile > My eSIMs. Tap Top Up on the eSIM you want to top up and follow the on-screen steps to add more data without losing your current connection.
Should I enable data roaming for the eSIM?
Yes - you must enable data roaming for the eSIM line, even though there are no roaming charges. The eSIM connects to a local partner network and your phone treats this as roaming. Enable it: iPhone > Settings > Cellular > eSIMno line > Data Roaming ON; Android > Settings > Network > SIMs > eSIMno > Roaming ON. This setting only affects the eSIM, not your main line.