4G not working - Xiaomi Mi A3 Questions & Answers

i have currently flashed Evolution X 5.2 on my phone and 4G is not working for me. I have Vodafone 4G sim inserted in my device. i had tried to change APN's and even after flashing stock fastboot ROM 4G is not working for me.
it a device related issue.
Twice 4G was working but after a reboot 4G is disabled again and 2G is only working.
Also the same 4G sim is working on my other devices.
Please Help
Thanks in advance
(edit: even after flashing evolution x 5.3 this issue persists)

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[q] s-off att htc one m8 wrong signal

Hello guys!
I bought here in Europe (Slovakia) ATT verzion HTC ONE M8 from the US.
I Unlocked Bootloader, Rooted it and get S-OFF and super CID. I have now flashed Venom viperone M8 ROM 1.8.0.
BUT I have very wrong EDGE signal. I need this only on telephoning. I use on data WiFi.
What i must doing to get better signal? PLEASE HELP.. THANKS
Did it work on your cell network before you flashed Viper?
Fixed
I just fixed this problem. Problém was in the network mode. I had set up automatically and I live in country where is only edge. So I set up manually manually on GSM and I get full signal like in other my devices. Thanks.

problem with 4G LTE network

i had some issue with my HTC one device. the seller said that it is supporting 4G LTE. in the setting of network i had found GSM / WCDMA / LTE i choose it and it is not working with the 4G LTE. i tried my sim card on other device and 4G working with out any problem. i had also do the APN setting and it is not working.
my device: Htc one
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Le max 2, 4g/LTE not working/issues

Okay so I don't know if the is just me but on madsurfers ROM and stock ROMs I get 4g but on any others like moki/RR/cm/ I only get the hspa and I have tried switching apns (I am on atnt BTW) and forcing LTE only but nothing works! I am currently on RR 5.7.4 official but no 4g might just have to go back to madsurfers ROM

sprint unlocked S5 to T-mobile , need help

Hi,
I unlocked my phone with sprint and moved to T-mobile ..
I Rooted the S5 but still have problems with wifi calling and the wifi tethering and the MMS
I'm looking for help to fix these problems or a Rom i can use to install on my device ..:good
Thank you ..
massia said:
Hi,
I unlocked my phone with sprint and moved to T-mobile ..
I Rooted the S5 but still have problems with wifi calling and the wifi tethering and the MMS
I'm looking for help to fix these problems or a Rom i can use to install on my device ..:good
Thank you ..
Click to expand...
Click to collapse
contact TMobile Technical support for the MMS portion, the sim should be encoded already for it but if not the mms number might need to be changed on the phone
massia said:
Hi,
I unlocked my phone with sprint and moved to T-mobile ..
I Rooted the S5 but still have problems with wifi calling and the wifi tethering and the MMS
I'm looking for help to fix these problems or a Rom i can use to install on my device ..:good
Thank you ..
Click to expand...
Click to collapse
how did you get your phone unlocked? through Sprint? I tried multiple times and it still ulocked for domestic use atleast
Hey guys,
I have a SM-G900P and went through a lot of steps to get it properly working, at the best you will be able to get HSPA+ and if you do get LTE it will randomly go back to HSPA+ until you toggle airplane mode again. I now use a SM-G900T because of this very issue.
How I unlocked it: https://forum.xda-developers.com/galaxy-s5/help/sm-g900p-straight-talk-att-t3331284
IDoneApps App
Had to enable the "GCF Setting" on the phone.
Me attempting to force enable GSM LTE bands on this phone: https://forum.xda-developers.com/galaxy-s5/general/how-to-sm-g900p-lte-band-t3333760
I had a similar issue when I took my verizon s5 over to tmobile. There was an exploit to get the unlocked Dev bootloader, once I did that I was able to flash a tmobile stock rom and wifi calling and LTE started working normally. Here is a link to what I did to get it working on my phone. https://forum.xda-developers.com/showpost.php?p=71697776&postcount=280

no 3g or 2g network ?

Hello fellow xda members, i have a new problem with my redmi note 3. i tried several roms in the last day but on my simcard slot 1 i dotn get 3g or 2 g working. it can not find any network only 4g and with sim 2 only sometimes it works when i manually select my 3g network. and because i dont have volte my callings doesnt work and i can not get calls either. i tried to flash the latest firmware for los from the forums even tried several versions but still not functions. roms where i testet are tesla rom, nitrogen os and validus
hopfully someone can help
ok i have an update. so if i use simcard 2 it works always but sicmard 1 doesnt find any 2g or 3g networks. can someone help tried nearly every firmware and even tried to get back to stock but edl doesnt work for me cause of read error at port

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