[Xiaomi Mi A1 Questions & Answers] findrome:
Question for developers; I realize this will likely fall under "etc", but what is the likelihood that we could look forward to some kind of voltage control beyond restriction (which btw appears to be exquisitely sufficient). Asking because I've been playing with network stability and suspect power may be acontributing factor. Not that I'm suggesting strongly that a kernel may be the answer, I don't know the depth of it's implication.

For your consideration;

- I've found that network drops most frequently during extended screen off, I think suggests a power management issue.

- In the US, T-Mobile uses band band 4 broadly, but has an agreement with A&TT allowing T-Mobile to use AT&T's band 40 for roaming. Activating band 40 using network signal guru (and the appropriate home network bands) enabled roaming.

- Lastly, a report from Germany indicated that the MiA1 had the highest emmisivity of radiation above other handets, radiation being radio frequency. My allusion, again to a power issue, leans against this as well. If our radios are overpowered, it may adversely affect reception. Ask any HAM operator.

Your thoughts?

---------- Post added at 11:55 PM ---------- Previous post was at 11:53 PM ----------

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Nah bro. Not talking about harm from radiation. The point I was making is our radios may be overpowered, which (a) may starve the receiver if improperly managed or designed [given the chipset and PCB is designed and by Qualcomm, the latter is unlikely]; or (b) the high output might interfere with the receiver. I think (b) is the more likely of the two as band interference is a reality in ota TV and home networks.

---------- Post added 23rd June 2018 at 12:02 AM ---------- Previous post was 22nd June 2018 at 11:57 PM ----------

I'm pretty sure radios are dynamically adjusted, dependant on the need of power. Like it will draw more power as the need for it raises. Since the main cellular radio draws the most power when the reception is the worst it can possibly be.

The worst case scenario of overpowering would be - radio stack would become unstable, it would heat up randomly or even the phone would crash at random instances.

Further looking into the source code would tell all the truth, but I doubt Xiaomi did something for the worst.

---------- Post added at 12:04 AM ---------- Previous post was at 12:02 AM ----------

QUOTE=airidosas252;76885943]I'm pretty sure radios are dynamically adjusted, dependant on the need of power. Like it will draw more power as the need for it raises. Since the main cellular radio draws the most power when the reception is the worst it can possibly be.

The worst case scenario of overpowering would be - radio stack would become unstable, it would heat up randomly or even the phone would crash at random instances.

Further looking into the source code would tell all the truth, but I doubt Xiaomi did something for the worst.[/QUOTE]

I think your looking in the direction I'm trying to point you!

(1) its probably nothing wrong with the modem, likely a management problem; software.

(2) I keep hammering on "overpowered" but the reverse is equally probable. It could be underpowered.

This might be indicated by the network issue worsening indoors, when the radio should be scaling power up.

(3) I'm sure we should be looking at code. China's networks are state owned, China as whole only use maybe 3 or at most 5 bands, and most of the populace doesn't generally stray far from home; so network management may be an issue for us because, ultimately, the MiA1 is a repurposed Mi5x.

(4) it may be that the proper optimization doesn't exist between between OS and hardware and drivers.

Lastly, I don't want anyone to think I'm being lazy about this. I don't know coding. Currently trying to teach myself Python on several play store apps, but time is the obstacle. I figure the least I can do is get what info I have to those in the best position to do something with it.