5

Devin, I am not extremely familiar with stock Android, so I apologize if some of what I try to describe does not work exactly as I try to explain it. The SMS messages on your phone is maintained in a single database. That means you can use different messaging apps for SMS and the message "streams" or "history" stays the same regardless of the SMS app you ...


5

They don't have to change the ROM on every phone by hand. They have a relationship with the phone's manufacturer, so the carrier's customized ROM gets installed on the phones at the factory. This customized ROM might include their boot animation, bloatware, settings (e.g. APNs) for their network. These phones often also have slightly modified hardware: the ...


4

You can easily manually switch carriers in Project Fi: Head into the Phone Dialer app that came with your Nexus phone, then type in these dialer codes to manually switch carrier: Sprint = *#*#FISPR#*#* T-Mobile = *#*#FITMO#*#* US Cellular = *#*#FIDAN#*#* Auto = *#*#FIAUTO#*#* You can also download the Fi Info app, which automates the process a bit with a ...


3

These carrier specific modifications are committed to the source code and are automatically included during the build process through the buildsystem to compile the source code and resources into a factory image (ROM as flashable ZIP-file or whatever format is used for distribution) or software update. HTC relased an infographic a few years ago illustrating ...


3

If you get a device working on a specific carrier or not depends on the following factors: cellular standards and frequency bands artificial locks on the device and sometimes willingness of the carrier First, check what your future carrier and phone have. For carrier networks and frequencies Wikipedia is the most complete source I know: http://en....


3

Carrier locks work at SoC/bootloader level. In simple terms the modem - which has its own Baseband Processor - is tuned to certain frequencies / bands or programmed to register with only one MCC/MNC which identifies a universally unique carrier. MCC/MNC is part of IMSI which is stored on SIM card and used in initial authentication process when device goes ...


2

As far as I know, phones don't report to the carrier if they are smartphones or not. They only report their unique IMEI number, from which they can't tell the type of your phone. (Unless they ask the manufacturer.) Also it is illegal to change. The carrier forcing you to pay for a data plan simply because you have a smartphone would be weird and highly ...


2

Singal Spy is the app that I use to do this. It also shows you at a glance what network you are currently connected to:


2

I can not add a comment in your question because I have not the neccesary score to do it. So, the only way is doing a new answer 😅😅 As I explain you in the other question you could add to any network, any other network of other country for that it do not behave like a roaming. I am going to explain my point of view about the problem to develop this feature....


2

Update So, actually, I've tried to install magisk, which I believe is the culprit. Following the documentation, since this model does not have Ramdisk memory, I've patched the recovery.img file using their Manager application, and then flashed my recovery partition, using fastboot flash recovery /path/to/magisk_patched.img After rebooting, their ...


1

.... my phone will work better around the world and others are fixed to certain regions? In theory, yes. That's the purpose of a global phone (also called international phone) ....other phones can be unlocked by rooting or something like that to work the same as "Global" phone? No, since it requires changes at hardware (modem) and corresponding drivers....


1

I took the SIM card to a carrier outlet, and they said that it is a damaged SIM card and replaced it. Thanks @Izzy for the helpful comment! :)


1

This is the JP/TW variant of ZenFone 3 Max - detailed specs here. From the listed LTE bands, it's missing the crucial Band 20 (wide coverage) for European countries and main bands for major carriers in the US. You will likely get less-than-stellar LTE coverage out of the device as a result. 3G will still work and likely suffice for most use cases.


1

VOLTE is a standard. And like all standards the devil lies in details of implementation. Carriers may choose different implementation for various reasons Section 2.2.1 of PDF document here offers reasons as to why implementation differs and hence updates are needed ....VoLTE interoperability issues might be related to EPS bearer set up, proprietary ...


1

Andy Yan is right. The phones sold by all major carriers have their bootloader locked. Your G6 variant won't be the same G6 that allows TWRP (and thus custom roms, and root) to be installed easily. See Post: https://forum.xda-developers.com/lg-g6/development/recovery-twrp-lg-g6-us997-unofficial-t3629883 Saying : A message to those with other variants of ...


1

Yes and no. Most times probably not, but there are some carriers which not only apply software modifications but also obtain specific hardware configurations from manufacturers (AFAIK Verizon is one of those having done that in the past for some devices at least, and T-Mobile was mentioned in that context as well). Which means, there's no "generic answer" ...


1

I have a Galaxy S8 from Verizon and I switched to an MVNO which piggybacks on T-Mobile's network. With the new carrier, the phone does not recognize the service and does not perform an update check. However, after inserting the original SIM card, Verizon does allow the system update to be checked, the update to be downloaded, and installed. I then have to ...


1

Different models use different baseband hardware and software tuned for the carrier's operation bands. From what I found through search, a Straight Talk S5 (SM-S902L) is a Verizon S5 (SM-G900V) minus the bootloader lock, which supports LTE band 4/13. This is distinctly different from a US Cellular S5 (SM-G900R4) with LTE band 2/4/5/12/25. Unless you've ...


1

FWIR, the Project Fi SIM contains the two separate carrier profiles (separate USIM applications with their own IMSIs that obtain the lease for one carrier or another) which are selected by some undisclosed means, as noted here (there is some theorization that this could be done by software on the baseband processor or possibly the SIM card itself, and as ...


1

I can't believe it but I managed to resolve the problem. Just a quick list of details to help future google searches: I had a BQ Aquaris M5. Bought it sim-free, but then added a giffgaff sim. Later I changed to a three sim, removed giffgaff sim and inserted three sim, but three network was not recognised. (Emergency call only.) Resolved problems by going ...


1

Verizon uses LTE bands 2, 4, and 13. Brazilian carriers appear to use 3, 7, 28, and 38. As such, you should by default expect US Verizon phones not to work with LTE in Brazil since there are no overlapping bands. However, the Verizon Z Force supports bands 2-5, 7, and 13. So it's quite possible that it would work on some Brazilian carriers using bands 3 ...


1

Solved it myself after tinkering with it for the last day. While not recommended, it is possible to flash the Galaxy with other carrier's "version" of the android OS. So the old stock Sprint operating system was removed and replaced with a T-Mobile variant which changes all of the settings to GSM on the back-end for me. If you move from carrier to carrier ...


1

As far as i know, the modem only exist one 4G. You can use it in both SIM (switch it) but you can't use both at the same time. Even if you're thinking using the first one is 4G and the last one is 3G, it won't work. It's dual-band not dual channel, and beside it will make your phone a lot thirstier than before and i'm pretty sure you don't want that.


1

If you want to get the latest firmware for your Samsung Android device, head over to http://sammobile.com/firmwares/ and type in your Model number found in Settings->Device Information (or maybe one of the subcategories like Software information) It can also be found at the beginning of either Baseband or sometimes Build number. As a last resort the box ...


1

Nothing is utterly IMpossible, but it's certainly improbable. They'd have to carefully monitor every bit of your network traffic, and as WhatsApp encrypts all of their traffic, your carrier would then have to break that encryption which is no small task. The alternative is for your carrier to have installed some sort of monitoring software on your phone pre-...


1

It's nothing to do with Huawei. You need to contact the carrier who you got the phone from.


1

SIM card subsystem is more complex than most people realise. SIM cards can store applets, which can be run silently (without user acknowledgement) when a phone is booted with a sim installed. It would in theory have privileges to perform system actions like install an app or boot animation. If the branding is being initiated by the SIM card, then you have ...


1

I had rooted my mobile. But as I dint read the instructions properly regarding installation of new ROM, I had hardbricked my mobile. I thought it would not be repaired under warranty. but one question came to my mind: when I can't switch on my phone how will others do? However, I gave my mobile to service center within two days. But when I went in search ...


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