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    [HowTo] Alternate way of saving battery when using 4G/LTE

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      • D Offline
        domubpkm
        last edited by

        It makes me think now that it would be useful to have a direct switch accessible by the indicator bar (network or battery) to switch directly from 4g to 2g and vice versa.

        KenedaK 1 Reply Last reply Reply Quote 0
        • KenedaK Offline
          Keneda @domubpkm
          last edited by Keneda

          @domubpkm
          I talked about that feature once, as i turn on 4G only when i need lot of bandwich to save battery when not needed, and got negative return...

          edit : https://forums.ubports.com/topic/4406/manually-choose-lte-only-wcdma-only-lte-and-wcdma-etc/7?_=1622034590341

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          D 1 Reply Last reply Reply Quote 1
          • D Offline
            domubpkm @Keneda
            last edited by

            @keneda Yes, I've read it and I still think it would be useful 😉 There is no obligation to use it.

            KenedaK 1 Reply Last reply Reply Quote 0
            • KenedaK Offline
              Keneda @domubpkm
              last edited by Keneda

              @domubpkm said in [HowTo] Alternate way of saving battery when using 4G/LTE:

              I still think it would be useful

              I still think too ^^
              BTW @c4pp4 tweak is a good thing too.

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              • arubislanderA Offline
                arubislander @Keneda
                last edited by

                @keneda Lots of things could be useful, and indeed, no one would be forcing anyone to use it if they didn't want to.

                But: implementing the feature would take time and effort from some developer. The feature would have to be implemented, tests would have to be written to check that the implementation is correct, and more importantly, remains correct when changes are made to the feature. And from there on out both the feature and the tests would have to be maintained in perpetuity (not having a feature encourages workarounds, removing a feature incurs rage).

                So yes, from the user's perspective, more features are better, since everyone need only use what they find useful. But the developers must maintain all the features equally, irrespective of their frequency of usage. So you can understand why "I think it would be useful" is not a sufficiently compelling argument to take on the burden of maintenance of a new feature.

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                • D Offline
                  domubpkm
                  last edited by

                  One way to save battery power, as seen with my Volla, is to turn off cellular data when not needed and turn it back on when needed. This does not prevent the use of phone and SMS functions.
                  It is the fact of being connected to a 4G, 3G or even 2G network that really drains the battery and even more so when the sky is not clear (inappropriate atmospheric conditions): there the overconsumption can get out of hand.

                  KenedaK 1 Reply Last reply Reply Quote 1
                  • KenedaK Offline
                    Keneda @domubpkm
                    last edited by

                    @domubpkm Problem is that prevents from receiving MMS.

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                    • D Offline
                      domubpkm @Keneda
                      last edited by domubpkm

                      @keneda Yes, nothing is perfect! For mails, they arrive well once the cellular data has been reactivated. For MMS, when cellular data OFF, a SMS informs the recipient that the MMS could not be recovered.
                      screenshot20210528_133042098.png

                      jezekJ 1 Reply Last reply Reply Quote 0
                      • jezekJ Offline
                        jezek @domubpkm
                        last edited by

                        @domubpkm There is a pull request waiting for approval, which handles all the trouble when receiving MMS while cellular data is off. Feel free to test and report. 😉

                        jEzEk

                        D 1 Reply Last reply Reply Quote 1
                        • Mario.CHM Offline
                          Mario.CH
                          last edited by

                          Hello c4pp4,
                          thanks for your work on the topic of battery saving.
                          I did the test on my Sony Xperia X (F5121). The device switches to G2 as promised. However, when the device wakes up, it does not switch back to LTE.
                          Unfortunately for me, my network provider no longer supports G2, so I have no connection to the antenna, i.e. "The subscriber is currently unavailable".:beaming_face_with_smiling_eyes:
                          Now I want to remove the script or the changes I made.
                          Is that possible?
                          And how do I do that?
                          Could you support me.
                          Greetings Mario

                          Translated with www.DeepL.com/Translator (free version)

                          📱 Oneplus Nord N100 UT20.40 (OTA5); then Xperia X (since 2020) at last UT 20.04(OTA5), now out of service due to defective camera
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                          • D Offline
                            domubpkm
                            last edited by

                            To do that, i deleted the script (lte-battery-saver) and the upstart session job (lte-battery-saver.conf) and rebooted the smartphone.

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                            • c4pp4C Offline
                              c4pp4 @Mario.CH
                              last edited by

                              @mario-ch Hello,
                              what kind of connections are available in your case? I can help you to tweak the script for your needs.

                              Anyway to take back the changes, remove both files:

                              rm /home/phablet/lte-battery-saver
                              rm /home/phablet/.config/upstart/lte-battery-saver.conf
                              
                              Mario.CHM 1 Reply Last reply Reply Quote 1
                              • Mario.CHM Offline
                                Mario.CH @c4pp4
                                last edited by

                                @c4pp4 As it seems, or rather I think 3G would work.

                                📱 Oneplus Nord N100 UT20.40 (OTA5); then Xperia X (since 2020) at last UT 20.04(OTA5), now out of service due to defective camera
                                🐎 When you realize you are riding a dead horse, get off!
                                My languages skill: 🇨🇭🇦🇹 🇩🇪, and only orally: 🇬🇧 🇹🇭

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                                • c4pp4C Offline
                                  c4pp4 @Mario.CH
                                  last edited by

                                  @mario-ch You mean switch to 3G when display is off and switch back to 4G when on?

                                  Mario.CHM 1 Reply Last reply Reply Quote 0
                                  • Mario.CHM Offline
                                    Mario.CH @c4pp4
                                    last edited by

                                    @c4pp4 yep, that's exactly what i mean.

                                    📱 Oneplus Nord N100 UT20.40 (OTA5); then Xperia X (since 2020) at last UT 20.04(OTA5), now out of service due to defective camera
                                    🐎 When you realize you are riding a dead horse, get off!
                                    My languages skill: 🇨🇭🇦🇹 🇩🇪, and only orally: 🇬🇧 🇹🇭

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                                    • c4pp4C Offline
                                      c4pp4 @Mario.CH
                                      last edited by c4pp4

                                      @mario-ch Ok give me some time, I will test it on my xperia x and let you know.

                                      BTW you can try it on your own when you replace "gsm" with "umts".

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                                      • c4pp4C Offline
                                        c4pp4 @Mario.CH
                                        last edited by c4pp4

                                        @mario-ch In case of Xperia X (maybe it's related to Halium 7.1) we have to set it to "lte" option instead of "any", so the script for your needs (3G<->4G) is here:

                                        #!/bin/bash
                                        
                                        interface=org.freedesktop.DBus.Properties
                                        member=PropertiesChanged
                                        
                                        dbus-monitor --session "type=signal,interface='${interface}',member='${member}'" |
                                        while read -r line; do
                                                if [[ ${line} == *"com.canonical.UnityGreeter"* ]]; then
                                                        read && read && read -r line
                                                        if [[ ${line} == *"IsActive"* ]]; then
                                                                read -r line
                                                                [[ ${line} == *"true"* ]] && /usr/share/ofono/scripts/set-tech-preference /ril_0 umts 1>/dev/null
                                                                [[ ${line} == *"false"* ]] && /usr/share/ofono/scripts/set-tech-preference /ril_0 lte 1>/dev/null
                                                        fi
                                                fi
                                        done
                                        
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                                        • D Offline
                                          domubpkm @jezek
                                          last edited by

                                          @jezek said in [HowTo] Alternate way of saving battery when using 4G/LTE:

                                          which handles all the trouble when receiving MMS while cellular data is off

                                          Hello. You done a huge work..! congratulations.

                                          Does it mean that the main purpose of the work is that MMS could be received normally with cellular data OFF ?

                                          KenedaK 1 Reply Last reply Reply Quote 1
                                          • KenedaK Offline
                                            Keneda @domubpkm
                                            last edited by Keneda

                                            @domubpkm said in [HowTo] Alternate way of saving battery when using 4G/LTE:

                                            Does it mean that the main purpose of the work is that MMS could be received normally with cellular data OFF ?

                                            No the purpose is to not loose MMS in any cases and being able to download them when data is back on.
                                            You can't receive MMS without data on, no software tweak can change this.
                                            See there if not already done for full story : https://forums.ubports.com/topic/5100/the-mms-lost-story

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                                            • D Offline
                                              domubpkm
                                              last edited by domubpkm

                                              It's not a story, it's a ''bible'' (which I hadn't read) like the amount of work (and surely headaches) put in by @jezek .. Yes, the aim is, rather, to have a delayed download (or to be able to delay downloading the MMS) when the cellular data is reactivated which is great. In short, the idea is to ensure that the MMS is not lost. I think it's more exact.

                                              ....and this would be good as it would allow the cellular data to be turned off to save battery power and turned back on when needed to download the MMS. 🙂

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