this post was submitted on 06 Aug 2023
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I'm looking for recommendations. I'd like to automatically turn off my cellular modem whenever I'm attached to a good Wi-Fi signal. Airplane mode on demand.

My rationale is multiple: I'd like to save battery life when I don't need it. I don't need phone calls or SMS. Everything goes over the internet for me anyway.

I would like to reduce my exposure to cellular security problems, and location tracking.

Ideally whatever implements this would be open source.


edit ---- Using the word modem was probably wrong in the post. I want to turn the cellular features off. No mobile data, no mobile phone calls, no mobile text, I would like the cellular part of the phone to be powered off.

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[–] [email protected] 7 points 1 year ago

Normally it's an option hidden inside androids developer options that you can just flip. The cellular tile will still show being on but data will be off.

[–] LemmyWinks666 7 points 1 year ago* (last edited 1 year ago)

I remember this feature being removed around Android 9 or 10ish. Possibly. However, you could always use Tasker. Someone even built a convenient profile you can import.

[–] [email protected] 6 points 1 year ago (2 children)

I've not use it but this seems to support what you want. It's a bit jank looking but seems to have the desired features.

[–] [email protected] 3 points 1 year ago (1 children)

Oh yeah this is premium jank. Thank you! I'll give it a shot

[–] [email protected] 1 points 1 year ago* (last edited 1 year ago)

Sadly it's not able to turn on airplane mode without rooting the device. And that's not currently an option for me

But I was able to set up some rules to turn off Bluetooth automatically. Which is nice. So thank you for the link!

[–] WhoRoger 2 points 1 year ago (1 children)

Wooo that is old Droid 2.x style adorable

[–] [email protected] 3 points 1 year ago

Really throws you back in time

[–] amenotef 3 points 1 year ago* (last edited 1 year ago) (1 children)

For just the data. There is a developer settings "keep mobile data always active" something like that.

But i think it made little difference for me in terms of battery drain so I leave it on.

At the end, in my case after trying dozens of settings, battery drain for me is just handled by whatsapp and how crazily the app decides to start spamming the phone with wakelocks at certain times. Android/Google barely do something to cripple this app wakelocks.

[–] [email protected] 2 points 1 year ago

I think it made little difference for me in terms of battery drain

If you have a Pixel 6/7 or any phone that uses Exynos modem in general, it will make a noticeable difference in battery life. Simply because the modems are not as as efficient as the Qualcomm modems.

Source: I found the tip under r/GooglePixel and I noticed the battery life difference on my P7pro

[–] pacjo 1 points 1 year ago (1 children)

Unless you completely power off the radio you will still receive calls and messages. Some custom roms come with this option, but I don't know if it's possible to automate.

If you want to save more power, then enabling airplane mode and then turning wifi and / or bluetooth (depending on your needs) back on should save more power.

[–] [email protected] 2 points 1 year ago (1 children)

I'm confused by the comment. Are you saying that airplane mode still receives phone calls and messages?

[–] pacjo 3 points 1 year ago (1 children)

No, sorry. Airplane mode should stop all data exchange with mobile radio, but you should still be able to enable wifi and bluetooth while airplane mode is on.

I'm pretty sure all communication with carrier is disabled when airplane mode is on, which should save more power than disabling only mobile data transfer (in this case calls and messages still get transfered and connection with carrier is active).

[–] [email protected] 1 points 1 year ago

This is exactly what I want Yes