CellesimReviews of cellesim.com

Response from CellesimJul 15, 2026

Dear Natsuko, A follow-up to our earlier reply. Beyond the technical check, we decided to simply make this right: we issued a full refund on August 14 to your original payment method (a confirmation email was sent as well). Our earlier finding still stands — the eSIM was installed correctly and the plan provides coverage inside the United States — but a product that leaves a customer confused about where it works is our communication problem, not yours. We've since made coverage clearer on our plan pages. If the resolution changes your impression, we'd be grateful if you considered revisiting your rating. Thank you for the feedback either way. Alper — Cellesim

Response from CellesimJul 15, 2026

Dear Marie-Line, An update on our earlier reply. After looking into your case again, we decided the right thing to do was simple: we issued a full refund of your order on August 14, back to your original payment method (it can take a few business days to appear on your statement, and we confirmed it by email as well). Our technical check still stands — the eSIM itself was installed correctly and undamaged — but what matters most to us is that your trip's connectivity didn't go the way it should have, and you shouldn't pay for an experience like that. We are a young company and reviews like yours genuinely shape what we fix. If you feel the resolution deserves it, we would appreciate you taking another look at your rating — and if you give us another chance on a future trip, our support team will personally make sure everything works before you land. Alper — Cellesim

Response from CellesimJul 13, 2026

Hi Michael, Following up on our earlier reply — we didn't want this to end with "contact us." We reviewed your order ourselves and issued a full refund of $26.25 on August 14 to your original payment method (you'll also find a confirmation email from us). We're sorry the eSIM didn't work for your trip. Since your purchase we've fixed several of the root causes behind cases like yours, and we monitor every new order for delivery problems automatically. If the resolution changes how you feel about the experience, we'd be grateful if you considered updating your review. Either way, thank you for the honest feedback — it's how we get better. Alper — Cellesim

Response from CellesimJul 13, 2026

Hallo whitedragon, ein Update zu unserer früheren Antwort — wir wollten es nicht bei „schreib uns eine E-Mail" belassen. Wir haben deine Bestellung selbst geprüft und dir am 14. August den vollen Betrag (14,98 €) auf dein ursprüngliches Zahlungsmittel zurückerstattet (die Bestätigung hast du auch per E-Mail erhalten). Es tut uns leid, dass die eSIM auf deiner Reise nicht funktioniert hat. Seit deinem Kauf haben wir mehrere Ursachen für solche Fälle behoben und überwachen jede neue Bestellung inzwischen automatisch auf Zustellungsprobleme. Falls die Lösung deinen Eindruck ändert, würden wir uns freuen, wenn du deine Bewertung noch einmal überdenkst. So oder so: danke für dein ehrliches Feedback. Alper — Cellesim

Response from CellesimJan 24, 2026

Dear Juriaan, We are sorry to hear that you are disappointed with your experience. However, we would like to clarify how our services work to provide a complete picture for our community. As clearly stated on our website and product pages before any purchase is made, our "Unlimited Data" plans offer high-speed 5G/4G connectivity up to a specific daily limit. Once this limit is reached, the speed is adjusted (to approximately 0.38 Mbps) to ensure that you remain connected for basic needs like messaging without any service interruption. This is a standard Fair Usage Policy (FUP) used globally to provide sustainable unlimited access. We provide these details transparently so that travelers can choose the plan that best fits their data consumption habits. For users requiring constant high-speed data without daily throttling, we always recommend our "Fixed Data" packages. Our records show that the service was delivered exactly as described in the terms you accepted during checkout. While we understand 250-380 kbps is not intended for high-bandwidth tasks, it is not a technical failure but a documented feature of the specific plan you selected. Best regards, Cellesim Management Team