u/lukmly013 💾 (lemmy.sdf.org)

I like computers, trains, space, radio-related everything and a bunch of other tech related stuff. User of GNU+Linux.
I am also dumb and worthless.
My laptop is ThinkPad L390y running Arch.
I own RTL-SDRv3 and RSP1 clone.

SDF Unix shell username: user224

  • 81 Posts
  • 1.69K Comments
Joined 2 years ago
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Cake day: June 17th, 2023

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  • Thankfully in HS nobody really seemed to care what I was doing to begin with. In the end I was already going through with a fuck it attitude, as the principal rejected my request for individual study plan (also signed by a doctor as required).

    For example, on one math class I just pulled out my laptop, put in earphones, and did whatever else I found more useful (specifically at that time studying CCNA). Teacher called me to the board, I got an A, went back to my activity. Just one teacher got a bit upset when I was preparing for a national competition I was going to, and when asked to put away my laptop, I said that “I don’t have time for it”.
    It didn’t occur to me that it might seem rude, as it was true. But anyway…

    For majority of other classes, I was just doing whatever all the time, and only being mentally present for exams, which typically were laughably easy.



  • Not that, but I just feel weird to do anything but non-stop work during work time, so I’ll drink less water to not have to use a toilet during the 6 hours till break/end (just a part-time job).
    Once I was told to wait for something without being officially put on waiting time, and I just felt weird standing there doing nothing, because officially I was supposed to be working.
    When I was told that I am too slow (based on statistics for the day) and once that I did something wrong I took that quite personally. And fearing a negative point basically flooded my mind, meaning I couldn’t quite concentrate, meaning I was more prone to further mistakes, which just made me fear more… positive feedback loop of fear.

    I don’t know, I’ve been there for over a year. I just kind of have a dog-like “pleasing the owner” mentality. As such, getting an email saying I got a positive point feels pretty good.










  • I just realized I sound way too paranoid but it’s an interesting question

    Nope. Not paranoid enough. If school/work requires such software, that goes onto a separate device only for those purposes, which will then be considered untrustworthy environment like any public computer.

    Although perhaps in a sense it is paranoid compared to what others do. Recently I’ve had to get something printed without having own printer. I’ve found out people have no problem logging into their Google or Microsoft account on public PCs.
    I brought the PDF on a CD.
    There’s a certain small chance that something malicious could be written to a USB, and I don’t know about all the possible vulnerabilities. If mounted, perhaps the automatic media thumbnail generator could be exploited. That is probably paranoid, worrying about random software installed on your own computer is certainly not.






  • That’s how I got that, xD. Android doesn’t otherwise list 2G as an option anymore, though it can still display it.

    I wish I could deselect 3G however, since that isn’t a thing in my country anymore. (While keeping 2G)

    Even more advanced (on MediaTek) stuff is in *#*#3646633#*#*. It’s called engineer mode, and typically gets removed in OS shipped to customers, but some manufacturers just don’t do that (smaller Chinese). There I can even select specific network bands, or even specific cell tower by EARFCN and Cell ID, as well as tinker with settings I rather won’t touch because I don’t understand them. And for example, manual MTU setting can persist a factory reset, so not everything may be resettable.

    Even funnier, and probably part of the reason for removal, there’s Tx tests. For WiFi and cellular. Unfortunately, it only works for 4G on my current phone, and it blasts full power no matter the setting. But on my other MTK phone I can select 2G, 3G or 4G, frequency to transmit on, bandwidth, modulation, power level, type of data to transmit and some other settings.
    Welp, that one sounds illegal.
    I checked it with my SDR, it works. (The lowest power only seems to reach a few cm).
    Lastly, based on screenshot found on XDA, some variants allow easily changing IMEI via GUI, or at least using AT commands. Also likely illegal.

    I find it very useful for the band selection.