Database Develop

Reception issues with the Unlocked SM920-F on T-Mobile

So, I got the unlocked S6 off of eBay, SM920-F model. I made my research, it should work with the t-mo's LTE and all but so far it has not been playing ball with me.
First of all, even when I am on LTE on this phone, it just shows as 4G which is not a big deal, I can live with that but when I am on LTE, as you can see on the screenshot below, it does not show anything as to how strong my signal is,etc...If I am on H+ though, it does show my signal strength.
And my LTE(4G Signal) is always at about 2 bars at best, no matter where I am, even if I am in the T-Mobile store. I checked my APN settings but I don't think that's the issue.
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Anyone has any suggestions?
Thanks

Someone posted in another thread regarding LTE Discovery and the like apps don't work on the international models. I have the SM-G920I which is also International minus a couple of bands from your "F" global. Anyhow, with my Cricket Wireless sim the network status (not the lte discovery app) shows signal reception and movement however with my T-Mobile sim the network status does not move at all. Always shows -113. But if you use *#0011# the RSRP will show the true results of your reception. Oh and someone also mentioned that not all Global/International phones will display the "LTE" icon in the notification section even when you are connected to LTE. I believe it was carrier or tower/band specific.

Jio sim

Can Jio sim work in Mi4 and can i use mi4 to buy it
I know it's a stupid question lol:silly:

No, Jio works only on 4G phones, and the Mi3W or Mi4W is a 3G enabled phone only.

Enable VoLTE in Mi3
Amruth Pillai said:
No, Jio works only on 4G phones, and the Mi3W or Mi4W is a 3G enabled phone only.
Click to expand...
Click to collapse
I got an update MIUI 8 Global 7.1.5 | Beta it shows support for JIO in Change log.
But, unable to find settings to enable VoLTE in preferred network type.
Please check screenshots and help to use Jio in Mi3.
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Thanks.

pnp4all said:
I got an update MIUI 8 Global 7.1.5 | Beta it shows support for JIO in Change log.
But, unable to find settings to enable VoLTE in preferred network type.
Please check screenshots and help to use Jio in Mi3.
Thanks.
Click to expand...
Click to collapse
That changelog is just a general one, not device specific.
I don't know why people keep asking how to enable 4G on a 3G phone through software. It is a hardware limitation and no software on earth can make a 3G receiver work on 4G frequencies because it isn't designed to work in that particular frequency at all.

Unlocked S6 Active not connect to 4G LTE 6.0.1 v14

I just purchased an unlocked S6 active from the online market in Indonesia. everything works well expect 4G LTE network.
it only showed 4G icon behind the signal bar, after I checked the network on sim card status, mobile network type was on UMTS or HSPA, screen shot below
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then I also check the network status via *#*#4636#*#*, it still the same, network only connected to UMTS/3G and HPSA/3.5G
when I try to change the network type from LTE/GSM auto (PRL) to LTE Only, the signal completely disappeared.
and the network name on the sim card status changed to Unknown
I also change band via *#2263# but nothing.
I'm using Telkomsel, my previous phone (Mi4c) has no problem with LTE network. Telkomsel band was 900mhz/1800+ https://www.frequencycheck.com/carriers/telkomsel-indonesia
the S6 active supported 12 band inlcuding B3 1800+ and B8 900. https://www.frequencycheck.com/models/A3aR9/samsung-sm-g890a-galaxy-s6-active-lte-a
on paper, it should be worked
Is anyone has the same problem? or any solution to solve this?

anyone?

Did you try calling your service provider and asking for the apn settings? Also check that the provider that the phone was originally on doesn't handle LTE differently, and check if your service uses VOLTE, if it doesn't then you'll never get LTE in calls at least.

S20 FE ROM SWITCH DOUBTS. PLEASE HELP.

Hi I bought the s20 Fe(SM-G781U1) from the United States through a friend as I wanted the Snapdragon variant of the phone. I currently reside in India and I'm having network issues with my local sim provider not to mention the lack of call recording features the Indian s20 fe enjoys. Recently samsung has launched 5G Snapdragon varaint in India as well. I was hoping get some guidance and help from the forum on how to switch the ROM to the Indian Snapdragon variant. Thank you!

You can't flash a different ROM on your phone. Get rooted with Magisk, install edxposed, there's modules that can enable call recording features. Info is out there in the forums here. Use search.

he bought an American version of the phone so (currently) he'd need to pay someone running a bootloader unlock service before he could root it.
it might be worth contacting Samsung about your problem if you can prove the sale with a receipt. they might take mercy on you and arrange for it to be flashed to Indian firmware, no guarantees but worth trying. find out from your network which frequencies you need with them. I've never tried it but back in the day there was some method thru which you could activate frequencies
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maybe one these dialer codes can help, I'm not gonna pretend to know what they mean.
copied from Quora "you can try *#*#4636#*#* dial this and go to phone settings(phone info or 1st option ) then select on three dot at right upper corner there you will find find radio frequency option select on it and choose any.may be it work because smartphone itself decide better frequency you can choose it"

Network Issue

So I recently bought this Xperia 1 Mark 2 and to be honest it's the best phone I have used apart from the battery life.
When I bought it, it was in Taiwan Firmware region which gave me bad network reception like 3 bars on 4G LTE+ or LTE and no 5G at all.
So after searching online I finally changed to SEA which is much better improvement.
But the issue is now I am getting full bars everywhere which is a good thing but no 5G and still slow speeds with full bars I just don't understand.
If anyone can help me understand that would be great.

The bars are pretty pointless: At best they would indicate your reception. In the worst case they show utter garbage.
You should look instead for ASU, on my LOS it's in settings:
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Mobile phone signal - Wikipedia
en.wikipedia.org
That value is quite meaningful, and if I remember correctly, it is the base for the reception bars (and every dev can freely assign the ASU value to any number of bars).
However, reception can be good but traffic is still very slow. How? For example one provider in Germany (Telefonica) was infamous for such thing: You had 5 bars and even a good ASU but still very spotty traffic due to overcrowded and badly connected cells.
Perhaps that helps you to figure out your bottleneck (or to provide more info here).
PS: Found a nice overview - sry, it's german only but there's always google translate, right?
https://www.lte-anbieter.info/technik/asu.php

How has your phone been since flashing SEA firmware?
Also does wifi calling work?