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How to use eSIM on a non-eSIM supported device

While not all phones come with eSIM support, you can still enable this feature with a bit of tinkering. In this guide, I’ll show you how to set up eSIM on phones that don’t have it built-in, so you can take advantage of this convenient technology. What is eSIM? An eSIM is a small chip embedded into a device’s motherboard that replaces traditional SIM cards. It allows for remote provisioning, meaning users can download and activate carrier profiles over the air using QR codes or activation codes provided by carriers. The device’s operating system and embedded Universal Integrated Circuit Card (eUICC) software manage the secure storage and execution of these profiles. The eSIM can hold multiple profiles, enabling easy switching between carriers or plans through the device settings without needing to physically change SIM cards.

Friday, May 24, 2024 | 6 minutes Read
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Dynamic Task Scheduling with Spring

Summary Spring makes it very easy to schedule a job to run periodically. All we need to do is to put @Scheduled annotation above the method and provide the necessary parameters such as fixedRate or cron expression. But when it comes to change this fixedRate on the fly, @Scheduled annotation is not enough. Ultimately, what I wanted to do was periodically load my configuration table from a database. But the fixedRate which indicates how frequently I will load this table is also stored in the very same database. So what I wanted to do was reading this value from a database and schedule the task according to it. Whenever the value changes, the next execution time should change with it too. Before going into next step, I also created a repository for all the code in this tutorial to show how this scheduling works. You can find the example code in my Github page Also at the end I will add an alternative way for scheduling with exact date and a way to start the scheduler from external service (like controller). Please check the above repository for various scheduling examples.

Saturday, September 8, 2018 | 8 minutes Read