this post was submitted on 02 Oct 2023
1006 points (90.6% liked)
Technology
74055 readers
4144 users here now
This is a most excellent place for technology news and articles.
Our Rules
- Follow the lemmy.world rules.
- Only tech related news or articles.
- Be excellent to each other!
- Mod approved content bots can post up to 10 articles per day.
- Threads asking for personal tech support may be deleted.
- Politics threads may be removed.
- No memes allowed as posts, OK to post as comments.
- Only approved bots from the list below, this includes using AI responses and summaries. To ask if your bot can be added please contact a mod.
- Check for duplicates before posting, duplicates may be removed
- Accounts 7 days and younger will have their posts automatically removed.
Approved Bots
founded 2 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
The components to make the phone able to decode FM radio take place. Which, in such small device, is valuable. If you really need FM radio for emergency situations, why not take a dedicated miniaturized FM radio receiver?
Not sure if this is still the case, but in the past the FM radio functionality essentially came "free" as part of either the SoC or modem. Since it used headphone wires as the antenna, the death of the headphone jack pretty much killed any purpose for including it.
There is no such thing as "free" functionality in hardware. Old SoC may have had this functionality, but it was at the cost of some die space, that has since been reclaimed by other function more useful to most users.
The functionality is, in fact, still there, and basically every phone with a headphone jack turns it on.
Modern SoCs still have it...
Further we've moved to Software Defined Radios in general... So it's all programmable.
Hence the quotations around "free". Qualcomm isn'tgoing to tape out a custom chip without it for you just because you don't want that block.
This was my uncertainty, do you know for certain that they don't include FM functionality on their chips anymore or are you just guessing? The public facing documentation is not exactly detailed enough to tell for sure.
No, but it's so immaterial it hasn't really been worth the effort to exclude it yet
FM radio was integrated in even smaller phones 20 years ago. And the tech to "decode the signal" is already present in today's phones. FM are radio signals, just like NFC, Wifi, Bluetooth and cellular.
Not the same radio frequencies, not the sames technologies (analog vs digital). Those radio hardware are very specialized, and won't work on frequencies or technologie they are not meant to.
Correct, not the same technologies. It's a much simpler circuitry. Very specialized doesn't mean very complex. A hammer is very specialized too.
I read somewhere that SoC boards on today's phones still have FM tuning capabilities, but they just don't use them.
I'll try to verify that, though.
Edit: this link seems promising: https://www.makeuseof.com/tag/how-to-unlock-fm-radio-hidden-smartphone/