Does the Samsung Galaxy S21 Ultra support eSIM?
Partial. Limited. The Galaxy S21 Ultra supports eSIM only on certain global/EEA variants.
Details & region notes
Most S21 models — including US and Asian variants — do NOT have functional eSIM. Only select SM-G998B global firmware builds enable eSIM. Not recommended to rely on it.
Can I use a travel eSIM on the Samsung Galaxy S21 Ultra?
On supported regional variants, yes — but check your model number first. Travel eSIMs are primarily data plans — you'll get mobile data (including 4G/5G where available) but standard voice calls/SMS usually don't work. You can still make calls via WhatsApp, FaceTime, Signal, Telegram or similar apps.
You can typically store multiple eSIM profiles on your device (several at a time) and switch between them as you travel.
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