Author Topic: Communications & Tech Discussion Thread #2  (Read 152687 times)

Daley

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Re: Communications & Tech Discussion Thread #2
« Reply #150 on: March 20, 2022, 10:21:01 AM »
If Ting is using Verizon's equipment now, does that mean I need to watch out for GSM vs CDMA?

Not really anymore. It's all about LTE band support these days (LTE is 4G GSM) as T-Mobile's already about shut down all of Sprint's legacy network and Verizon will be shutting off their 3G CDMA network at the end of the year. If you want to use Verizon, you'll just need LTE band 13 on the phone to activate.



Going to try installing new software from your link.

I'd recommend switching carriers before switching firmware, honestly. Explanation as to why the firmware switch is a long shot fix after the next quote. If you want to, anyway...

Read the instructions a couple three times first, make sure you have all the ADB stuff installed to your system. Use the recommended GApps package that Lineage suggests for Android 11, you should be fine. Just download everything in advance before getting started, including a factory OEM image to revert to if necessary (just in case), and do MD5 error checking to make sure the downloaded packages are good. The Pixel phones are some of the easier to flash, honestly. Take your time, read thoroughly (including links), and you should be good... but, if you're uncertain or confused with anything, don't take the risk. At least the factory firmware is Android 11, and it's only 16 months out of date. I've seen worse.

If you want to take this opportunity to part ways from Google being all up in your data, you can always go LineageOS for microG instead. This path requires sacrifices, though.

As far as going to another carrier, if I can't get VoLTE to work on my phone, wouldn't I run into the same problem with them? Apologies if that question is very basic: just not following that part.

Not really, no. The phone has official VoLTE support/blessing on all three networks. This means the VoLTE problem is likely on AT&T/Airvoice's end specifically, and either a problem with the new SIM card (unlikely) or AT&T's IMEI whitelist misidentifying your phone model and refusing to allow for VoLTE provisioning (more likely). You can try the firmware update, but it's honestly a long shot to get things working, given the IMEI is a fixed and immutable number tied to the hardware. Turning off all the wireless network modems but the LTE ones to try and force the phone to provision for VoLTE is a long shot, at best. This isn't to say getting more current and secure firmware isn't a good thing in general for the device no matter which carrier you fall back to, but even if it doesn't work for AT&T, the G011C has LTE band 13, so stuff should just work on Verizon, but I'd do an IMEI check first anyway just to be certain.
« Last Edit: March 20, 2022, 10:24:53 AM by Daley »

alsoknownasDean

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Re: Communications & Tech Discussion Thread #2
« Reply #151 on: March 20, 2022, 10:34:52 AM »
Are bands 2, 4 and 5 still in widespread use by US carriers? They still seem common enough on 'world market' phones.

Surely they need to have some suitable bands for foreigners roaming on US networks with their phones?

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Daley

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Re: Communications & Tech Discussion Thread #2
« Reply #152 on: March 20, 2022, 11:04:03 AM »
AT&T's IMEI whitelist misidentifying your phone model and refusing to allow for VoLTE provisioning (more likely).

By the way, this reason quoted right here is why AT&T is such a frustrating mobile carrier now. Whitelists/Blacklists are imperfect at best, and can contain errors with whitelists being far more aggressively prohibitive than blacklists and prone to accidental exclusion. AT&T is using a pretty bog standard IMS/VoLTE provisioning, but they're using IMEI whitelists to dictate who can actually connect to the voice network based on specific phone models, whether the phone can actually support VoLTE calling or not.

The reality of this decision means that even if a Verizon or T-Mobile branded and unlocked or global handset has support for AT&T's major LTE bands and VoLTE support, it may not actually work on AT&T. You'll note, the AT&T approved device list is mostly US flagship phones, US-based "global" handsets, or AT&T exclusive models. Intentionally or not, it effectively behaves as vendor lock-in that kills handset portability between US carriers, and blocks perfectly fine SIM unlocked phones that can and should work on their network from working.



Surely they need to have some suitable bands for foreigners roaming on US networks with their phones?

Like I said, there's a reason why most modern actual global/international handsets are just including LTE Band 13 support now. Verizon doesn't give a crap what phone you bring to their network anymore so long as the phone is SIM unlocked, not on a blacklist, and has support for their near globally exclusive C block Band 13 and IMS provisioning support to activate the SIM.

To kill handset interoperability in an era of what should be near universal handset interoperability here in the US:

-AT&T has restricted VoLTE calling support to an IMEI whitelist;
-T-Mobile has restricted VoLTE calling support through a non-standard implementation that requires software signatures;
-Verizon has restricted VoLTE calling support through the requirement of the phone supporting LTE Band 13, a band exclusive to Verizon in the US.

Of this, Verizon is the easiest to work around for international travel now, and most global flagships are accommodating for it. It also makes Verizon the most third party ROM support friendly, too. The 2020's are gonna go down as the "not the Onion" decade for all the events and twists it's held.

There's supposed to be roaming friendly and interoperability agreements between carriers here for bands 2/4/5 IIRC, but mobile networks are gonna mobile network.
« Last Edit: March 20, 2022, 11:41:57 AM by Daley »

zolotiyeruki

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Re: Communications & Tech Discussion Thread #2
« Reply #153 on: March 20, 2022, 11:10:03 AM »
Of this, Verizon is the easiest to work around for international travel now, and most global flagships are accommodating for it. It also makes Verizon the most third party ROM support friendly, too. The 2020's are gonna go down as the "not the Onion" decade for all the events and twists it's held.

There's supposed to be roaming friendly and interoperability agreements between carriers here for bands 2/4/5 IIRC, but mobile networks are gonna mobile network.
This surprises me greatly, especially given Verizon's history of blocking any bootloader unlocking on their phones

Daley

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Re: Communications & Tech Discussion Thread #2
« Reply #154 on: March 20, 2022, 11:25:18 AM »
Of this, Verizon is the easiest to work around for international travel now, and most global flagships are accommodating for it. It also makes Verizon the most third party ROM support friendly, too. The 2020's are gonna go down as the "not the Onion" decade for all the events and twists it's held.

There's supposed to be roaming friendly and interoperability agreements between carriers here for bands 2/4/5 IIRC, but mobile networks are gonna mobile network.
This surprises me greatly, especially given Verizon's history of blocking any bootloader unlocking on their phones

Oh yeah, they still block bootloader unlocking on their branded devices (just like AT&T and T-Mobile does), but there's no software hoop jumping or incomplete whitelist nonsense for non-carrier branded devices to potentially prevent them from working once you get the third party firmware on there. It's a "most third party ROM support friendly" distinction built upon a list of technicalities.

Like I said, it reads like an Onion article: Notoriously restrictive mobile network becomes most friendly towards third party firmware and international travelers by being less restrictive on VoLTE requirements than all other mobile networks so long as your handset supports their exclusive network frequency.
« Last Edit: March 20, 2022, 11:40:52 AM by Daley »

Done by Forty

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Re: Communications & Tech Discussion Thread #2
« Reply #155 on: March 20, 2022, 11:56:00 AM »
Thanks for all the help, IP Daley. I'm debating switching carriers & porting my  number or just using this excuse to buy a newer-used phone.

I saw a reddit thread saying I could contact my carrier & asking them to update their line provisioning to match my IMEI number...any chance this is worth my time with either Airvoice or AT&T?

Daley

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Re: Communications & Tech Discussion Thread #2
« Reply #156 on: March 20, 2022, 12:08:40 PM »
Thanks for all the help, IP Daley. I'm debating switching carriers & porting my  number or just using this excuse to buy a newer-used phone.

I saw a reddit thread saying I could contact my carrier & asking them to update their line provisioning to match my IMEI number...any chance this is worth my time with either Airvoice or AT&T?

Don't buy a new phone if you can help it. If the current one is still functional in every way but working with AT&T specifically, it's still got life left. It's more environmentally friendly swapping SIM cards than entire phones. Use it up, wear it out, and choose a provider who'll let you potentially do that if the existing one won't. You can probably go and get a Redpocket new account kit with a CDMA card from Target today. Then you just have to contact Airvoice to get the account info necessary to port your number out.

You can also try to get Airvoice to try and get AT&T to update the line provisioning, but given that hasn't even been on Airvoice's radar with all the support you've gotten from them already...? Last I've heard and understood, the only people who can fix IMEI whitelist provisioning "errors" are support staff helping loudly complaining customers with full-blown AT&T postpaid accounts. Prepaid and MVNO people doing BYOD have pretty much been left flapping in the breeze.
« Last Edit: March 20, 2022, 12:10:22 PM by Daley »

dang1

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Re: Communications & Tech Discussion Thread #2
« Reply #157 on: March 20, 2022, 06:39:59 PM »
About voice calls: ymmv- in the last couple of months, Iíve averaged about 5 minutes of voice usage (though about 80 GB of data). When I make the rare voice call using a phone number, I primarily, do by my Google Voice number, that uses data. Though, I actually prefer to use Facebook Messenger voice calls- seems like much clearer than VZW and Google Voice