Develop Bugs

Mi Mix 2 on T-Mobile

Is Mi Mix 2 works on US T-Mobile for VOLTE and WiFi Calling?
Thanks in advance.

It should

stu5797 said:
It should
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I just want to make sure since it comes from overseas and not sold officially in states.

Yes, existing services will work, however the SIM card for the account with the services has to be activated on a network approved/issued phone. If not, you will need to call support. If you've used volte before bringing the phone onto the network, it will work from their end though you may have to change the settings on the device. If you are trying to activate a new service with the phone, you will need to call T-Mobile.

t-mizzle said:
Yes, existing services will work, however the SIM card for the account with the services has to be activated on a network approved/issued phone. If not, you will need to call support. If you've used volte before bringing the phone onto the network, it will work from their end though you may have to change the settings on the device. If you are trying to activate a new service with the phone, you will need to call T-Mobile.
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Thanks. How about wifi calling?

Same as volte or other features. If a network service/feature has been active/used on the network before the new phone was brought to the network, it's all good from the carrier end.

t-mizzle said:
Same as volte or other features. If a network service/feature has been active/used on the network before the new phone was brought to the network, it's all good from the carrier end.
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I don't think thats a correct statement. I have VOLTE and wifi calling on my current phone. But when I got Xperia XZ premium mone of those features worked.

daviddem said:
I don't think thats a correct statement. I have VOLTE and wifi calling on my current phone. But when I got Xperia XZ premium mone of those features worked.
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You misunderstood. If you put a SIM into a network issued or supported phone, typically the services that are already active will work right away. However if you bring a phone to the network that is not sold by the carrier, chances are you will have to call them to get the services working.
Some carriers are setup in a way that inserting a new sim into a phone unknown to the network won't work, some or all services may be disabled but if you put the new sim into a recognized device first, the sim and it's services will be active and you can just transfer it to the unrecognized phone. Of course, that may not be enough, modifying APN settings on the phone for example may be needed to get it running

I'm going to cut my monthly bill in half by switching to project fi and I'm sharing my plan here though it will work and/or make sense for very few users out there.
It only makes sense to do this if you are already on T-Mobile's network and you pull less than 2GB from the LTE network. This is due to the low base cost but high bandwidth prices through project fi. If you are a heavy data user and you don't pull the bandwidth from wifi, project fi plan would cost more than the T-Mobile you're on.
Next up, you need one of these 6 devices:
Pixel XL Model G-2PW2100 (North American version)
Pixel Model G-2PW4100 (North American version)
Android One Moto X4 (All versions)
Nexus 5X Model LGH790 (North American version)
Nexus 6P Model H1511 (North American version)
Nexus 6 Model XT1103 (North American version)
While you can use most phones on project fi, (all phones that already work on T-Mobile will do) only these 6 phones can activate a project fi sim. If you don't already have one, you don't need to buy them, you can just borrow one from a friend however they can be used to activate a fi sim only once, after the activation that phone won't be able to activate another. Or if you find a damaged phone cheap, it only needs to be able to connect to the internet, read a sim and it's touch screen is still working, you can do that. Nexus and pixel phones with shattered screens sell as low as $50, you just need it activate it the sim. If you don't pull lots of data, you recover the cost in 2 billing cycles.
Project fi works by having a physical T-Mobile SIM, virtual Sprint SIM (it supports up to 10 virtual SIM cards) and it connects to an array of wifi networks in urban areas throughout the US. A fully compatible project fi phone connects to all of them, other phones aren't compatible with the virtual SIMs so they are limited to T-Mobile's network, so if you are a T-Mobile user, nothing changes except the reduction in monthly bill (provided you don't pull lots of data through T-Mobile.
Now this is where the mix 2 comes in. It's compatible with all but the T-Mobile band 71 but I wouldn't get excited about that anytime soon, by the time T-Mobile fully deploys it's 600 MHz band, today's flagships will have reached end of life anyway, it's something to consider once mix 3 or mix 4 are out. I suspect that the Mix 2 is capable of utilizing both T-Mobile's and Sprint network due it's array of compatible bands but I won't know for sure until next week. Even if it's not, using the mix 2 through T-Mobile's network only at a reduced cost is still a good deal.

t-mizzle said:
I'm going to cut my monthly bill in half by switching to project fi and I'm sharing my plan here though it will work and/or make sense for very few users out there.
.
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You would be better off switching to http://www.mintsim.com
The 2Gb, and unless you are extremely miserly on Data, the 5Gb plan will be cheaper than Project Fi. Mint is on T-mobile, and owned and operated by UltraMobile. You do have to buy several months at once, so that is a downside, but if you can afford the outlay of cash, it is a very inexpensive service. I personally just switched from Project Fi, and have been happy with the service.

That is a good alternative too. Ting is also an option for those wanting to reduce their bills. I live in an urban area and project fi is the only viable alternative for me, all the local MVNO's get blatantly deprioritized.

daviddem said:
Thanks. How about wifi calling?
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T-Mobile's WiFi Calling will not be baked into the Mi Mix 2, there for you won't have the ability to use it. T-Mobile requires a WiFi certification through them that the phone manufacture must pay for and provide units for testings in order to receive their certification. Although the Mi Mix 2 has every band supported that T-Mobile uses outside of the new 600MHx band 71 and extended band 4 on band 66, it will work fine for calling and texting but no WiFi Calling.

Can anyone confirm volte works on T-Mobile? Thanks!
Sent from my Redmi Note 4 using Tapatalk

Ulver said:
Can anyone confirm volte works on T-Mobile? Thanks!
Sent from my Redmi Note 4 using Tapatalk
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VoLTE works on MintSIM, which is an MVNO on T-Mobile.

Has anyone used it with actual T-Mobile and can confirm it's working? Or is it guaranteed to work with actual T-Mobile if it works on a T-Mobile MVNO? Thanks guys!

I am in Australia on Telstra, on my Redmi 3 it used to drop from LTE to 3G when making a call.
Now is says 4G+ even during a call, on my MI Mix 2
When I turn on Volte is says HD next to 4G+, when I turn off Volte the HD disapears, I guess HD stands for High Definition?

FMXP said:
Has anyone used it with actual T-Mobile and can confirm it's working? Or is it guaranteed to work with actual T-Mobile if it works on a T-Mobile MVNO? Thanks guys!
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Yes,I got the MIX2 two days ago,have used it w/LTE Bands 4 & 12.
VoLTE is built-in/switchable on/off,AFAICT,no WI-FI Calling.
From my limited use,it all works well (calls/text),connects to WI-FI very quickly,stays connected.
Data signal seems to work well also,turned off WI-FI to test weak T-Mobile signal when @ home,found/stayed connected to Band 12 w/no problem.

There is no WiFi Calling option in this phone (I just got one) ?

toiday said:
There is no WiFi Calling option in this phone (I just got one) ?
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WiFi Calling for T-Mo ile is enabled on a certified device by T-Mobile when a T-Mobile SIM is detected. The Mi MIX 2 has not submitted a request for testing and has not paid for the certification process to have T-Mobile WiFi Calling enabled. Xiaomi is not marketing the device towards the U.S. market so there will not be any T-Mobile WiFi Calling on the Mi MIX 2.

toiday said:
There is no WiFi Calling option in this phone (I just got one) ?
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Wifi calling works if you use Google Voice.

Hack to use Verizon's Visible service on Note 8

Hi, I switched to Visible when they just recently got rid of their data cap on their unlimited plan. I get unlimited data, text and minutes for $40/mos. That includes all taxes and fees. Sounded good. Problem is they're limited on phones that are compatible. I still don't understand why some phones are compatible with their service and some aren't, but was wondering if there was someway to hack the compatibility issue. An S9+ is compatible for Visible. Can I hack it to believe my Note 8 is an S9+? Any other ideas?

I use xfinity mobile and bought their 1 dollar android phone with service and then swapped sims, did this on note 8, and s8+ never had issue. If you have an old android Visible are offering free crappy android free in trade with service, you could try swapping sim, but I don't know if they will activate it or not.

What Type
Was your Note 8 an unlocked phone or a Verizon Note 8 that worked on visible?

seanpowell95 said:
Was your Note 8 an unlocked phone or a Verizon Note 8 that worked on visible?
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It was a Verizon phone that I flashed to an unlocked phone (XAA firmware). Visible will not work on it as far as cellular service goes. LTE works great for internet but I can't receive calls or texts on this phone.
I have a Samsung S9+ and a Pixel 3axl that both work on Visible, but would be nice to use it on my Note 8. Anyone with ideas? I was thinking about trying to trick Visible to see it as an S9 or some other phone that's compatible, but not sure that would work. I've messed with APN settings to match those of the S9+ when it was connected to the Visible mvno network.

scottsdca said:
It was a Verizon phone that I flashed to an unlocked phone (XAA firmware). Visible will not work on it as far as cellular service goes. LTE works great for internet but I can't receive calls or texts on this phone.
I have a Samsung S9+ and a Pixel 3axl that both work on Visible, but would be nice to use it on my Note 8. Anyone with ideas? I was thinking about trying to trick Visible to see it as an S9 or some other phone that's compatible, but not sure that would work. I've messed with APN settings to match those of the S9+ when it was connected to the Visible mvno network.
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Hey I was browsing google for this same issue cause I would like to go to visible and on the samsung threads I found a link to reddit about the proper app settings. I have a flashed U1 note 10plus with the starwars theme on it and the only thing I see on there is it more then likely needs to be U or U1. I cant post links but google " reddit Unlocked Samsung Galaxy Notee 10 Plus purchased directly from Samsung fully working on Visible "

Exynos Note 10+ 5g with Android 10 update - Tmo Wifi Calling working, no CSC/patch

Anyone else notice that after updating to Android 10, all the necessary Wifi Calling software is just baked in now?
I have the korean SM-N976N , Note 10+ 5g and am on USA T-Mobile. Now, on the Korean Note 8 I had to make a custom CSC patch which included some software from the F variant as well as the U T-mobile variant (as well as delete a Korean feature) to get Wifi Calling working.
However, on this 10+ 5g I haven't had time to root or work on a CSC patch to get WFC, but after updating to Android 10 a few days ago, it is just baked in by default now and works just fine. I did have to go into the Wifi Calling menu and change the preference to Wifi, but it is definitely connected and works great.
Now I'm really not sure rooting is even worthwhile anymore... adblock would be nice and CSC feature customization is also great but... everything just works now (minus phone-app Samsung Pay of course, but rooting wouldn't solve that).
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Anyway - anyone else notice this? Wondering if AT&T WFC will work now as well.

KT- Hey! I ALMOST got a Exynos Note 8 a while back, based on your experiences fixing it for T-mobile. Now I'm seriously considering the Note 10+, because it seems even more US friendly.
There's been some talk about Carrier Aggregation. Has there been any progress? Does it REALLY matter? How slow is "slower" gonna be? Would I notice if I didn't have a US version right next to me?
I'm actually thrilled that the Wifi calling just works now! That becomes a huge issue for me once a year, when I travel to the deep Boonies to see my family.
Also, I'm thinking of getting the F/DS. Would it be better if I track down the N, like I believe you have?
Long time listener, first time caller. Thanks so much!

How has your service been? On my N975F, its been ok. Slow data speeds, and weak signal, have been issues ive been dealing with. Im also using on T-mobile in the US.

What about 5g? Did u managed to get it working? I live in China and technically n976n has to work on n78 band but it doesn't

Question S21 FE (Exynos) Mobile Internet Issues

Hello All,
I have been facing a weird issue with my phone. What happens is that my mobile data randomly stops working. I will see the sign in the status bar but the arrows that show that data is being sent and received (for the internet to work) only shows the sending/uploading arrow and not the receiving/downloading arrow.
I am unable to recreate the issue on demand it just happens randomly. I have tried everything on the internet and so far nothing is working right now.
So now I am asking the xda community for support.
Let me know what info I can provide further to help diagnose this problem.
Thank you.

I have seen this problem in other S21 FE and even in the snapdragon variant, there is no solution yet, only apply warranty.

kirbyNx said:
I have seen this problem in other S21 FE and even in the snapdragon variant, there is no solution yet, only apply warranty.
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Went to Samsung and they are saying there is nothing wrong with the phone. How to claim warranty?

@mahroze
Same issue I am facing with my Samsung S21 FE(Indian variant). In Samsung community, multiple people have reported the same issue for Galaxy S21 Ultra(Exynos variant).
S21 ultra mobile data issue. - Samsung Members
S21 ultra mobile data not working. - Samsung Members
S21 ultra Mobile data problem. - Samsung Members
Dual sim mobile data issue still not resolved. - Samsung Members
The only workaround I found was to disable the second sim and then data was not getting stopped randomly.
I have submitted this issue along with logs in the Samsung members app multiple times. But there is no confirmation about this issue or fix plan from their side.
It's really annoying that a basic feature is not working properly!!!

Dec 2021 I brought a second hand s20 FE 5g. Everything was good in that phone except network. It had no proper carrier aggregation support even though it had when it got released! Sold it immediately because of network issues. What is the use of phone if it doesn't do its basic job like connectivity properly. Brought s21 FE recently thinking that samsung might have done some work by looking into their previous failure. And they indeed did! For 3 weeks that is!!! Now, Forget about CA. Can't even use 4g internet properly. Even with single sim! Internet suddenly goes on strike for no good reason. Have to toggle Aeroplan mode on/off. I still don't understand samsung. They know that they need work in handling network properly and yet they ignore it. My 4 year old Redmi note 7 pro which I brought for 8k gets continues CA with same sim in same area and a 55k so called flagship phone can't handle that properly! Hats off Samsung.

Same thing is happening with me, it happens only for second sim.
I wish Samsung fixes it with the updates.
Using exynos version

Posting here a quick fix, may be it'll help someone.
If you are using two sims and facing this issue.
Recommendation is to switch one sim network to 2g/3g and keep the other data sim to 5g/lte/3g/2g, it'll fix occasional disconnection of network.

u2014428 said:
Posting here a quick fix, may be it'll help someone.
If you are using two sims and facing this issue.
Recommendation is to switch one sim network to 2g/3g and keep the other data sim to 5g/lte/3g/2g, it'll fix occasional disconnection of network.
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I'm using single sim in my s21 fe. Thought of putting other sim from my redmi phone but now i'm getting better internet in my 4 yeal old phone than this pathetic piece of ****. Sadly both of my sims are of jio so can't use 2g/3g mode.

Question 5G status bar icon lying

Is there a way to show the TRUE network type your connected to on the Pixel 6 Pro in the status bar? Mine almost always says 5G, but when I check with SignalCheck Lite, it's actually connected to LTE on AT&T bands B12, B66, etc. I've only ever seen it actually connected to 5G-NR once in SignalCheck. It's quite deceptive of Google to have the phone show your connected to 5G when your actually not.

I'm certain it's due to your carier not Google.

bluegizmo83 said:
Is there a way to show the TRUE network type your connected to on the Pixel 6 Pro in the status bar? Mine almost always says 5G, but when I check with SignalCheck Lite, it's actually connected to LTE on AT&T bands B12, B66, etc. I've only ever seen it actually connected to 5G-NR once in SignalCheck. It's quite deceptive of Google to have the phone show your connected to 5G when your actually not.
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google is lying to us always... sorry to read that

iRhyiku said:
I'm certain it's due to your carier not Google.
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It's possible I suppose, but I bought this Pixel 6 Pro as an factory unlocked device and then put my sim card in it. I didn't get it through any specific carrier.

bluegizmo83 said:
It's possible I suppose, but I bought this Pixel 6 Pro as an factory unlocked device and then put my sim card in it. I didn't get it through any specific carrier.
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I believe your carrier controls how your mobile data is displayed. I'm on AT&T and in certain areas, I get "5G E" even though it's not really 5G at all. I'm just using that as an example.
5GE stands for '5G Evolution,' and it all started with AT&T. The US telecommunications company began promoting the term back in 2018 to separate itself from its competitors in the 5G race. AT&T claimed that with this upgrade, users could reach a network speed of 400 Mbps in areas with coverage.
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bluegizmo83 said:
It's possible I suppose, but I bought this Pixel 6 Pro as an factory unlocked device and then put my sim card in it. I didn't get it through any specific carrier.
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it's not where you buy it per say. your sim is tied to a carrier and when inserted in your phone will download some carrier specific software. most carriers 'lie' about networks. AT&T for example calls their latest 4G LTE '5G' on device and in promotional ads. also keep in mind not all 5G is equivalent and all carries denote them somewhat differently.

spinoza23 said:
google is lying to us always... sorry to read that
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it's not about lying, they just don't want you to be upset about your carrier coverage.

asdor said:
it's not about lying, they just don't want you to be upset about your carrier coverage.
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Ironically Google is one of the only OEMS (that i know of) that displays a more accurate signal bar, other OEMs boost it.