You are currently required to print out the e-Visa Approval Letter and present it to the Immigration Officer.
To ensure a smooth entry into the country, it is advisable to check the instructions provided by the e-Visa issuing authority or the official website of the country you are visiting. They will typically specify whether you need to present a printed copy or if displaying the electronic version is acceptable.
If the guidelines allow for it, carrying the electronic version or a photo of the e-Visa approval letter on your mobile device can be a convenient option. However, it is always recommended to have a backup plan by printing a copy of the e-Visa approval letter, just in case there are any issues with displaying it electronically.
Make sure to comply with the requirements provided by the issuing authority to avoid any potential complications during the immigration process.