[Samsung Galaxy S 5 Unified Development] curiousrom:
S5 LTE Download Speed Variations

Having the most recent modem as described in S5 Odin Flashable Modem & Bootloader may help getting better download speed.

If you do update your modem make a new EFS backup which will include some new firmware installed by the packages linked in that post. But keep the old one too, just in case.

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Tons of variables affect the phone signal strength, network type connection & download speed including the network provider, weather, geography, time of day & network traffic handled by the cell tower at a given time, outdoor/indoor, cell tower in line of sight or with obstacles like buildings, how you hold the phone, etc, etc.

I just ran 6 LTE download/upload speed tests using Speedtest by Ookla¹ and you can see the download speed variations from 8.39 Mbps up to 31.6 Mbps. That was outdoor with the cell tower in my line of sight @ about 600 meters and without my hand covering the modem's antenna located in the bottom of the S5.

In the other Speedtest screenshot attachment you can see 55 Mbps when ran an other day @ 4:48 AM.

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According to the principle if it ain't broken don't fix it, it's a bad idea to keep on restoring a EFS backup if you have cell network data working & you just have temporary download speed fluctuations.

What is your actual network signal reception strength & network type? Is there a lot of variations?

Recently & a few months ago my network provider is having technical problems in my village & making repairs. You can see in the GSam Battery Monitor > Graph icon > Phone signal and also GSam > Phone Radio screenshots the crazy fluctuations.

That's while staying at home where I normally get an excellent signal. :eek:

GSam uses very little battery & RAM & I have it starting at boot & running all the time because of it's cumulative stats. In the Graph panel you can pinch & zoom in/out to see several days while the LineageOS > Battery panel get reset every time you charge to 100%.

BTW there is a GSam user guide which is a little bit dated but informative.

But GSam does not show the type of network connections changes. For that I use Network Signal Info just when I need it because it does use a lot of battery. Privacy Guard > Network Signal Info > set Start at power up & Run in background set to Ignored*.

*More optimization tips in in S5 Remove Animations UI Speedup Test - Taming Google & Apps.

I am attaching a zipped ...log.csv made with Network Signal Info that can be opened in Excel or similar.

Under the Network type column you can see that it's unstable with changes from (DC)HSPA+ * 42.2 Mbps, HSPA * 14.4 Mbps to Unknown in a very short time frame.

The signal is also very weak as seen in dBm average & Percent. The lower the dBm, the better & -50 dBm is excellent & the best you can get while -120 is terribly weak.

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Currently with GSM/WCDMA/LTE when @ home the LTE signal strength fluctuates all the time between -95 & -65 dBm as seen in > About phone > SIM status which consumes battery while in Mobile network > Advanced > Preferred network type > GSM/WCDMA auto selected it's an excellent solid -50 dBm.

That setting does not work on your S5 G900V CDMA. It's for my Galaxy S5 G900M LineageOS 16.0 klte GSM phone.

I was talking with the manager of my network provider's local office, which is right next to a cell tower, & he pulled out his shiny new iPhone & showed me that it was the same thing for him: lower & fluctuating signal on LTE (4g) vs. 3g.

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¹ - If you are a Speedtest user or install it, to save power & privacy: Privacy Guard > Speedtest > set Start at power up & Get usage stats to Ignored and in Speedtest > Settings > disable Network signal scanning and > Analytics > toggle off. That's why they want to run in the background: to collect your data. :eek:

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FYI if you don't at least partly quote like I just did above or use the @ mention like [MENTION=2077790]pacard17[/MENTION] the user you are replying to does not notified.

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