Don't use mobile phone chargers. They might be convenient and cheap, but this is because they are meant for charging phones, not powering your SBC which has particular power requirements.
When you are evaluating a power supply, make sure you run some stress tests on your system to ensure that it will not cause issues down the path. (Micro) SD card issues can be sneaky. They might appear right at the start causing strange boot and login errors, or they might cause problems over time. It is best to run a test on any new SD card you use, to ensure that it really is what it is, and to ensure that isn't faulty. Armbian provides you a simple way to do this -- armbianmonitor -c /path/to/device/to/test
We can only help if you provide quality information for us to work with. All stable images from the download section are tested, most stable upgrades are tested and we have tens of thousands of users. Even with regular and extensive testings, bugs sometimes do slip through. This is a voluntary support service and is unrelated to board makers, and is not obligated to provide you any answers. Repeated asking the same questions because you're not happy with the answers will result in you being ignored.
Before you post a question, use the forum search as someone else might have already had the same problem and resolved it. And make sure you've read the Armbian documentation. If you still haven't found an answer, make sure you include the following in your post: 1. Logs when you can boot the board: armbianmonitor -u (paste URL to your forum post) 2. If your board does not boot, provide a log from serial console or at least make a picture, where it stops. 3. Describe the problem the best you can and provide all necessary info that we can reproduce the problem. We are not clairvoyant or mind readers. Please describe your setup as best as possible so we know what your operating environment is like. We will not help in cases you are not using stable official Armbian builds, you have a problem with 3rd party hardware or reported problem would not be able to reproduced.
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