[Guide] Boost Cell Signal to Max & Force CA/Volte/Vowifi if avail from Stock ROM

[Jay07jay]

Turn on airplane mode, switch WiFi on and attempt to place a call. Phone should display vowifi and place your call just fine if WiFi calling is indeed active. Might need to go into sim settings and be sure WiFi calling is turned on.

Just tried that and a message popped up "to place a call turn off airplane mode"

 

[Ducter]

Just tried that and a message popped up "to place a call turn off airplane mode"

If WiFi calling is selected in sim settings, settings> WiFi & internet> sim & network> sim settings it should place the call over WiFi. At least that's what happens on my phone but I use TMobile where WiFi calling is native.

 

[Jay07jay]

If WiFi calling is selected in sim settings, settings> WiFi & internet> sim & network> sim settings it should place the call over WiFi. At least that's what happens on my phone but I use TMobile where WiFi calling is native.

Same setup not sure if it's because of me being on the at&t network but I still get volte so I'm happy with that

 

[Ducter]

Same setup not sure if it's because of me being on the at&t network but I still get volte so I'm happy with that

I'll bow out now, I'm not sure if something else needs to be configured for at&t as I don't have them. At least you got volte working.

 

[gigilie]

Can we replicate?

Who knows the easiest way to go about tracking and replicating the changes made to embed them into a magisk, script or kernel so we can achieve these same modem enhancements on custom ROMs easily?

N those still in doubt these changes help or work I can tell you without a doubt that if your using a stock OOS Rom and using TMobile as your provider that these changes will not eat up your battery any more than normal and altho depending on your location and towers speed availability this can and will increase your overall speed and your ability to maintain a solid connection in low signal areas! It forces carrier aggration meaning it makes the modem in your phone connect multiple times over varied frequencies to achieve the highest level of connection. Like your old 4g phone x 3 up to 6 put together. So your speeds can be 600% improved. Of course the phone is technically supposed to do this on its own which it can occasionally but only in absolutely optimal situations. So not when you really need it too. Lol. So altho it might not work on carriers without this tech or overseas if u live in North America and use TMobile this will drastically help your phone whether you instantly notice it or not trust me it does

 

[ecompton59]

on phone setting try lte/td-scdma/umts it doubles speed for me and I'm settings you get lte/3g instead of 4g/3g/2g what's prl for

 

[spynathan]

I went from 2mbps download to a stunning 10mbps download! Yeah, signal out here is pretty rough... This was a huge improvement though, big thanks.

 

[egzthunder1]

Well, this seems to work quite well, particularly for the up speeds. They pretty much doubled (down was a bit erratic for a while but it is still quite an improvement).

Thanks for the guide!

 

[tusker559]

Just chiming in to say this worked for me. I ran a few speed tests and I got the best speeds with VT Switch off. Only gained a little more than 1mbps download (11.9 to 13.3 mbps) but it doubled my upload (5.44 to 12.3).

 

[merikgvr4]

Running Lineage. How do I install the stock oos dialer? Thanks

 

[Pain-N-Panic]

Running Lineage. How do I install the stock oos dialer? Thanks

Seems kind of off topic....does the lineage dialer not allow you to input the codes in the OP to get to the menu screens?

Regardless...I'm sure if you just Google stock "OOS dialer apk" you'll find an APK on the web, then just place in the correct system directory and set proper permissions.

 

[ecompton59]

the codes are in factory test apk rftoolkit

 

[ecompton59]

I did a little more then the mods on here still trying to get last xml and db but speed kinda better mtu change but it will eat battery a little more the 7pro I have went from 15mbs to 100mbs

 

[cyclejoc]

amazing upload speed

This little trick will change your measly 1 bar signal to nearly max bars and give you a solid consistent signal in places you normally would hardly have a connection. At least it did for me.

This goes a bit beyond enabling VoLTE from your SIM Card Network settings which if you haven't done you should enable before trying this... Of course you may not have the same results I had. I found it works best from Stock ROM no root needed I'm currently on 9.0.12 but tried it on 9.0.11 and Beta 5.

Like any mod you should make a backup now and proceed with caution. (By caution I mean don't deviate from instructions goofing around in any engineering mode is never wise)

You should try check your internet speed now (Google internet speed! And take note of it then run the same test to see if your able to improve at all.

Step 1: Optional step but for best results open dialer and type: *#*#4636#*#* From this Testing Menu select Phone Information. Once in phone info select LTE/UMTS auto (prl) for preferred Network type. Then scroll down a bit and make sure VoLTE is switched on. Exit the phone info screen.

Step 2: Open Dialer again and type: *#800#
A Warning Message to Engineering Mode will popup. Press Enter.

Step 3: Click on the first option Called OnePlusLogKit
Once in the LogKit scroll down until you see the menu called: FunctionSwitch now click and select it.

Step 4: There's 3 checkboxes of interest in this menu... VoLTE Switch, VoWifi Switch and VT Switch. I enable all three but some may have better luck not enabling VT Switch. After enabling each option it'll try and reboot your phone just say no until you have all you want enabled.

Now reboot and profit.
I can tell you without a doubt that if your using a stock OOS Rom and using TMobile as your provider that these changes will not eat up your battery any more than normal and altho depending on your location and towers speed availability this can and will increase your overall speed and your ability to maintain a solid connection in low signal areas! It forces carrier aggration meaning it makes the modem in your phone connect multiple times over varied frequencies to achieve the highest level of connection. Like your old 4g phone x 3 up to 6 put together. So your speeds can be 600% improved. Of course the phone is technically supposed to do this on its own which it can occasionally but only in absolutely optimal situations. So not when you really need it too. Lol. So altho it might not work on carriers without this tech or overseas if u live in North America and use TMobile this will drastically help your phone whether you instantly notice it or not trust me it does!
f you notice anything negative or battery draining or your phone becomes even more radioactive simply go back into the menu and disable the Functions. If this helped you at all throw me a like. Enjoy.

Amazing upload speed. Thanks!

 

[bowlandspoon]

Wow thanks for this guide!

Enabled me to receive 4G in my house when normally I get H+

 

[Nosferatu.]

Okay OnePlus 6T on newest OOS hard locks my phone after reboot after a minute or two with these settings enabled.

 

[gigilie]

Okay OnePlus 6T on newest OOS hard locks my phone after reboot after a minute or two with these settings enabled.

What version or beta or official, TMobile or international rom?

 

[gigilie]

Haven't been able to replicate in aosp

Running Lineage. How do I install the stock oos dialer? Thanks

Gotta be on stock OOS u can try using shortcut master and downloading the rftoolkit apk, phone apk, settings apk and the other OnePlus toolkit files installing them setting prefs then use the shortcut master to hop onto the menu were talking about... Then make the changes assumably (this hasn't been tried to my knowledge and prob won't work hence the stock required) and if it works uninstall the files but I'm kind of assuming this trick changes settings with the oos modem files too like I said not sure hasn't been done but feel free to try we just can't help u here all we can recommend is getting stock oos then apply the hack to get better speeds and a stronger signal. When I compared the download speeds from aosp to oos the stock Kills it.

 

[gigilie]

Possible new speed enhancement

A possible speed improvement maybe be noticable if when your able to edit the fast.tmobile apn for bearer select ever check box except unspecified instead of using the standard apn bearer unspecified. A friend claimed to see huge improvements in speeds (on his op7p not 6t but I'm sure it'd work for both)
If anyone wants to test this and post before and after scrns of your speeds for proof id like multiple verification before updating op. Thanks for your support and feedback appreciate all the users helping each other I don't get on very often...

 

[Nosferatu.]

What version or beta or official, TMobile or international rom?

Official ROM on an international device (not converted device) on T-Mobile network.