SMART Cellular may have 5 APNs for LG V60 ThinQs in the Philippines. Click the link below to view the list: https://apn.how/philippines/smart/lg/166...-v60-thinq-5g Do any of these APNs work?
If your phone and SIM cards work, but the data connection doesn't, I can think of a few reasons: (1) The SIM cards are in the wrong trays. Try switching the cards in the trays and see if it works. (2) The dual-SIM setup is configured incorrectly. A branch technician needs to confirm everything works before giving the phone back to you. (3) The dual-SIM setup is not part of your current phone plan. Customer support needs to explain the features you purchased.
If the battery is removable, try taking it out for about 10 minutes and put it back in. If that doesn't work, try a different charging cable. If both fixes don't work, then the battery may need replacing.
A permanent Antivirus solution like Kaspersky may be best to prevent future issues. But for the current abnormality, a free download of Malwarebytes (https://www.malwarebytes.com) can work. Having a data backup to OneDrive is always a good idea, as well.
It sounds like you bought a refurbished laptop. If you already upgraded the RAM, the fans are working, and the hardware/software/driver tests passed, the problem may be the CPU’s cooler. An overheating CPU can cause a thermal trip error that makes the PC restart unexpectedly. If the person who refurbished the laptop didn't confirm that they placed the CPU cooler correctly (correct amount of paste, fully functional fan, etc.), I would ask Best Buy about that.
If your school has admin access to your Chromebook, only they have the ability to remove it. Even if you did remove it (you can't), they would know because they monitor their equipment for tampering.
If the issue started when you switched from ViewSonic to Acer, please uninstall the ViewSonic driver. The PC may be having trouble “knowing” which one to use.