Develop Bugs

[Q] Do not select LTE on Samsung GT-I9195

Greetings to all. There is a Samsung GT-I9195 Galaxy S4 Mini LTE, operator MTS, sim with support for 4G (tested on another phone - LTE appears at once), the firmware 4.4.2, item selection LTE / WCDMA / GSM in the Settings menu is selected, but the phone in any does not want to catch 4G.
Also there is a strange feature in the service menu, in which I go through the program Advanced Signal Status (incidentally a good substitute command * # * # 4636 # * # * which is closed in the latest firmware), do not select LTE only, not selected EvDO only .
Can someone tell me what is the problem and how to fix it?

Try flashing a stock ROM again.

install different firmware was 4.2.2 and 4.4.2, and the result of the same everywhere, do not select LTE only, not selected EvDO only

No Mobile Data Problem

Back story:
Got used unlocked rooted Galaxy Nexus Toro from friend
Wiped
Tried updating to newer Cyanogen Mod - Failed
Found out b/c old recovery version
Updated Recovery to TWRP v2.8.7.0
Flashed CM 11-20140913-NIGHTLY-toro AV:4.4.4
Flashed Gapps from OpenGapps Aroma
connected to wifi and completely configured
The Problem:
After I left wifi coverage I realized I had no mobile data
can make calls but no internet or mms
No LTE icon but white bars do show signal
when i drop down the quick access menu the bars are orange
under settings>about phone> status
Network: Verizon Wireless
Signal strength: -93dBm 2asu
Mobile Network type: CDMA eHRPD
Service state: in service
Roaming: not roaming
Mobile Network state: Disconnected
under testing menu> Phone information
Signal strength: -93dBm 2asu
Neighboring CID: unknown
GSM service: In service
GPRS service: Disconnected
Network Type: 1xRTT
Radio Resets: 0
Data attempts: 0
Data successes: 0
Preferred network type: LTE/GSM/CDMA auto (PRL)
Things tried:
Set APN manually
Reset APN to default
Made sure data is enabled
Dialed *228
Went to Verizon and got new SIM installed/activated
At this point I have no ideas. I would really preffer to not flash my phone seeing as I have it completely set up how I like it, also from what I've read that likely won't help. Any help is greatly appreciated.
-Nerdreaper

HTC_One_M8_GPe_Marshmallow-6.0_MRA58K.H14 -> Voice Only, No Data

I just installed the HTC_One_M8_GPe_Marshmallow-6.0_MRA58K.H14_AROMA-Installer.zip on my HTC Verizon M8. After doing so I can only get data via Wifi, it does not connect to 3g or 4g. I was wondering if this is a known issue if someone could direct me on what steps I should take to troubleshoot. I should mention that even though its a verizon phone I am using Smart talk.
Here are my current settings:
Preferred network Type: Global
CDMA Subscription: RUIM/SIM
Access Point Names : VZWINTERNET.
Network Operators : receive "Error while searching networks"
SIM status -> Cellular network state : disconnected

You used this version? http://forum.xda-developers.com/verizon-htc-one-m8/development/rom-vzw-stock-gpe-5-1-lmy47o-h9-t3212413
Did you do as the thread states:
[*] If you have issues with 3g/LTE data hand off, do a full RUU and do a factory reset with the stock recovery. Alternatively just flash the stock recovery and do a factory reset. Theory is the stock recovery rebuilds NV data. Getting a new SIM card has also been reported to work. Calling customer service and asking them to reset your connection has also been reported to help.

I'm having similar issues but I'm using page plus(Verizon network with Verizon m8 and only text and calls work but no data. Also using Verizon APN any suggestions

SPH-L520 Working on Ting? No 4G/LTE

UPDATE: 4G/LTE wouldn't work without erasing all possible APNs except Ting's (with some messing around to get settings correct). LOS14.1 continued to throw errors with this install though so ultimately re-flashed with RR and it's working perfectly now.
--
I'm trying to port an S4 Mini SPH-L520 (CDMA) for use with Ting. Has anyone successfully done this with full access to phone, text and data? Having updated the carrier settings while stock, then flashed LOS 14.1 I've got functional voice, SMS, WiFi and can see 3G sporadically when I refresh network settings, but 4G/LTE's a no-go -- I get a "Your mobile data service couldn't be activated" error from the setup wizard every time the phone starts. It's definitely seeing Ting's SIM card because it's showing the correct ICCID, but won't work at all in RUIM/SIM mode ("No service", "Select SIM Card" with no options) and defaults back to NV. Haaaalp? I'm very computer literate but cell phones are terrifying and mysterious black magic...

Device doesn't connect to mobile network

I was on PixelExperience (latest) and yesterday flashed through Magisk 17.0 and 17.1. Today morning device couldn't connect to mobile network at all (2G/3G/4G/LTE). Wiped it completely, flashed latest dev firmware and Nitrogen OS + unofficial Gapps for Android Pie. Everything works quite smooth, but still my device can't connect to mobile carrier - any ideas what I can try? It's crucial for me to fix it today since I need to be able to send/receive SMS tomorrow.

Tried switching sim slots?
Just to see if the sim card works with the other slot.
Does an IMEI number show for both slots under settings - about? (Don't tell us your IMEI)
Are you sure your network provider hasn't cut you off by mistake or some other weird account based issue?
Try another sim if you can get one.
A pay as you go sim without credit should still show a connection even if you can't use it

Yeah, I did try.
1. Tried other card (got polish Orange card which connects to EE, UK EE card - both work in my brother's SGS6).
2. IMEI is okay, don't know if IMEI SV should be 00 though.
3. Cards work okay in SGS6.
99% it's software issue - I've used Magisk modules to widen Wi-fi bands and other modules - I did format all partitions and flashed latest stable Global MIUI through fastboot though and it should override all the settings. I've used the *#*# code and I can't pass the test.