General

Getting Started

• What is eSIM?
• Which devices support eSIM?
• How much travel data (GB) do I need for my trip?
• Why CELITECH?

eSIM Installation

• How can I install eSIM on iPhone?
• How can I install eSIM on Android phone (like Samsung Galaxy S20 or newer models)?
• For which countries I need to update the APN for my Android phone?
• What does "No usable data found" mean after scanning the eSIM QR code?
• Why is my eSIM showing "Activating"?
• How can I install or activate an eSIM QR code received on my mobile phone?

See all 10 articles

Service Guide

• Does CELITECH eSIM include a phone number?
• When shall I activate my eSIM?
• How can I check my travel data balance and top up?
• How can I troubleshoot service issues?
• What is the eSIM service Cancellation Policy?

Device Issues

• Can I use travel eSIM with my primary line?
• How can I troubleshoot my device connection?
• What happens if I delete my eSIM from my device?
• How can I check if my mobile phone is unlocked (i.e. not carrier locked)?
• How can I unlock my device?