Hi everyone!
I've surfed all I've found here about Xiaomi Mi A2 Lite and the bands/carrier problems here in the USA, but I can't solve my problem. Here are the facts:
I have a Xiaomi Mi A2 Lite Global Version, Android 10 updated, not flashed, not root, works perfect and I love it.
I moved to USA from Spain 1 month ago, I got a new SIM from T-Mobile and the first two days worked, but suddenly lost the connection, not only data but calls and messages.
If I change that SIM with another one, (also T-Mobile, my boyfriend bought it the same day, same plan), then it works again but after some hours not signal again.
I've been doing this SIM change over the last 2 weeks, but it is really uncomfortable, I've tried to get a pattern but it doesn't depend on the time that the SIM is on the phone (it can be operative 2 hours or 2 days) nor in the data used or in the area.
When I lost the signal, the SIM is recognized but is like I was inside a deep cave with no coverage.
There is no way to recover the signal, I've tried airplane mode, rebooting several times, reinserting SIM, port change, even changing the SIM and changing it back, but nothing.
When I have signal I get T-Mobile 4G LTE and runs smoothly.
My SIM ports are fine because both read my Spanish SIM card, and the SIMs cards work perfectly because my bf can use both.
I don't know if is a network compatibility problem, he has a POCO X3 that supports the same bands and he gets signal all the time.
I bought a new SIM card from Mint just to check if it was about the carrier, and It does not work either, even when the phone compatibility says that should work.
I'm stuck now
Any advice? Should I buy a new phone to live in the states? (I'm going to be here for a year and I'm spending so much money on moving in that I would prefer not)
Thank you in advance!
Related
Three network SIMs not working but O2 & Vodaphone SIMS ok-HELP! I'm really confused
Cannot find a solution either searching the forums or via Google so perhaps someone can help by answering this post:
Got an XDA Orbit that works fine when I insert either an O2 sim or a vodaphone sim (so the phone appears not to be locked) but not when I use a 3 (three) sim. When I insert a 3 (three) sim I get the message "Invalid or missing SIM card". I have 2x three sims and both do the same thing. However both the 3 (three) sims work fine in my XDA exec and Sony Ericson K610i so there appears to be no fault with the sim. So if the SIM appears to work and the phone appears to be unlocked what else is there?
I have considered upgrading the ROM but there seem to be a lot of people either turning this phone into a brick or breaking wifi (needed) while updating the ROM on the Orbit. If someone can point me to a rom that works without doing either that might be a solution.
Details of ROM XDA Orbit is running:
ROM version: 1.25.206.2 WWE
ROM date: 10/4/06
Radio version: 02.67.90
Protocol version: 4.1.13.28
ExtROM version: 1.25.206.101
Any thoughts or idea's welcome
PS. I have also tried inserting a little paper between the battery & the SIM as suggested in some of the forum posts which didn't work.
3 is a 3g network only, the Artemis is not a 3g phone.
Older 3 USIMS used to work, but when 3 noticed you were constantly roaming onto O2 (who provide 3 with their backup network, at a cost to 3) they blocked those SIMS. Newer ones simply don't work at all in 2.5g phones.
Upgrading the ROM would make no difference, you would need to change the handset to a different model to use the 3 network, but then frankly I never understand why anyone would want to.
i thought the same thing as the post above...but what made me wonder is why the 3 sim cards are working inthe xda 2s which is not a 3g phone.
maybe its not the 3 sim cards that are at fault here after....as hard as that is to belive
hey guys,
three sim cards will not function at all unless the phone is 3g enabled.
Remi
Even if the phone was 3g, 3 used to block IMEIs of phones not sold by them. Nice. Don't know if they still do that though.
update
arielc - my error, sim does not work in XDA2 (tested again), 3rd phone tested was a Sony K610i -> have updated initial post to remove error.
LargePig - The XDA Exec I have was bought from O2 and does work 100% (so far).
Gajet - I think you are right. Is there any way for the phone to fake to the sim that it is a 3G phone? I realise this is probably grasping at straws but thought I should ask just in case.
Assuming it is impossible to get the 3 SIMs to work any idea on what these are worth? I'm depressed askign this as it is a realy nice phone & I would prefer to keep it.
D1bbl3r said:
Gajet - I think you are right. Is there any way for the phone to fake to the sim that it is a 3G phone? I realise this is probably grasping at straws but thought I should ask just in case.
Click to expand...
Click to collapse
No the lack of function occurs when the SIM tries to register on the network I believe, so it instantly knows it can't register on the UMTS (3g) network, and because it hasn't tried it is blocked from registering on the GSM (2.5g) network.
Any 3g enabled phone should work, and there are 3g HTC pocket PC devices such as the Universal etc. but they all tend to be bulkier.
3 has to stop this behaviour because they have no GSM backup of their own and therefore they pay O2 to provide their backup, this means they make little (if any) money on those calls.
Personally I don't think 3 are as cheap compared to the other networks as they used to be, the other networks have had to try and attract customers back. You could get a SIM from the other networks for a fiver at the most. My personal recomendation at the moment is a T-Mobile Flext and Web & Walk Tariff.
As for the value of the 3 USIMS, Have a look on Ebay at what they are going for, they do have a sale value.
Hey guys!
So, I can clearly see this "Your SIM card does not allow a connection to this network" problem is quite common around here, so here we go.
After one year of normal use, I got my problem one day ago, no connection whatsoever since then.
Tried shutting it down, removing the battery and switching back on after 20 minutes.
Tried my sim card in another phone - Works fine.
Tried another sim card, from the same operator, in my phone - Works fine (WTF)
I then called my operator (it's a Brazilian operator so no matter mentioning it now) and of course, no solution. Payment is fine, everything normal.
So I wen't to my operator store and replaced the sim and... Still doesn't work!
I then borrowed a sim from another operator and... Nothing! No signal!
And just now, I realized that, when I change to "GSM Only" it works! The thing is I have an unlimited 3G plan, and use it a lot, this is not a solution for me.
I've always used my phone on "WCDMA Only" or "WCDMA Preffered", but when I switch to those, or to anything other than "GSM Only", it dies, no signal, even with GSM Auto...
I tried hard resetting, nothing helps here... I have no idea what to do next.
When on WCDMA Only:
Signal Strength: -71 dBm 21 asu
GSM Service: Emergency calls only
GPRS Service: Disconnected
Network Type : unknown
I bought the Phone brand new on eBay (or rather a brazilian version called Mercado Livre) and it's clearly from the UK (i can see from its plugs) but it's unbranded and unrooted, but unlocked.
Also. I heard this may happen with stolen phones, blacklisted IMEI's... How can I figure this out? And how does that explain the fact it works under GSM only?
Just searched my IMEI on different databases, doesn't seem to be stolen.
This is swelling my brain to the point I think it's gonna blow.
My Phone Sim Card (TIM Network) - Works on any phone, and works in my tablet, but not on my DHD.
My Tablet Sim Card (VIVO Network) - Works on my phone, and work on my tablet.
My friend's Sim Card (TIM Network) - Works on his and my phone fine.
So my DHD will work with ANY but my sim (which was replaced for a brand new today, with the same line)
And my sim will work with ANY device but my phone.
Oh my head....
Turn Aeroplane mode on, then off continuously until you get a 3G signal. If you still don't get connected, take your battery out, wait 15 minutes, put battery back in and it should connect.
If neither work then I know of nothing more you can do.
Sent from my Desire HD using xda premium
If other SIM card works fine and only have issue on 3g, then it must be an operator side error. Go in a TIM store and prove with different SIM cards, and Phone. They have to do someting.
I'm heading to China in a week and want to use my Note II (AT&T) on the China Mobile network. Does anyone have experience doing that?
I have been to my local AT&T store and they unlocked the phone for a non-AT&T SIM but I'm unsure about the Modem I should use (if a change is needed) and any other considerations.
I have rooted the phone and have CleanROM ACE 4.9 installed. No UV or OC or other tweaks.
I can buy a new pre-loaded SIM in China, as I have done in the past, but never with an Android smartphone.
I appreciate any feedback, guidance, or even horror stories that will help me get the phone ready for the trip.
MB
I've heard that you have to use china unicom to get 3g connection on an ATT phone. Is that true?
All, I thought I'd give an update:
I'm in China and can use my Note II here. I bought a micro-SIM and data connection service, but blew through the first pre-payment in about 18 hours, LOL, so now I just use the calls and messaging and that seems to work fine.
AT&T unlocked the phone for me (Even thought I had done it on my own using the "secret" menu) but I had to use some other tweaks to get it all working.
I'm on China Mobile which doesn't have the 3G, wish I had gotten the China Telecom, which does have 3G. There doesn't appear to be any 4G or LTE type service at all.
If I can remember what I did to get the whole thing working I'll edit the post.
Mike "reporting from Shanghai"
mbamberg said:
All, I thought I'd give an update:
I'm in China and can use my Note II here. I bought a micro-SIM and data connection service, but blew through the first pre-payment in about 18 hours, LOL, so now I just use the calls and messaging and that seems to work fine.
AT&T unlocked the phone for me (Even thought I had done it on my own using the "secret" menu) but I had to use some other tweaks to get it all working.
I'm on China Mobile which doesn't have the 3G, wish I had gotten the China Telecom, which does have 3G. There doesn't appear to be any 4G or LTE type service at all.
If I can remember what I did to get the whole thing working I'll edit the post.
Mike "reporting from Shanghai"
Click to expand...
Click to collapse
I'm in China now using my i317, you can't use China Telecom's 3G on the i317, you have to use China unicom. That's the same 3G as AT&T. you can have HSPA+(called 4G by at&t) by using this
I was in Shenzhen for work 3 times last year with an unlocked 4S since they could not supply a nano SIM for my 5. I used a China Mobile SIM card supplied by the vendor I was visiting. I was only able to get EDGE the whole time. I visited Luohu and Guangdong as well and still only EDGE. I am heading back on September 18th and am taking my Note II. I assume my experience will be the same. Maybe I will give give CU a shot this time. Happy and safe travels!
Back from China!
I used China mobile, but next time I would use China Unicom. They have faster data and cheaper too, I think.
jedimyndtryx said:
I was in Shenzhen for work 3 times last year with an unlocked 4S since they could not supply a nano SIM for my 5.
Click to expand...
Click to collapse
Can't you just trim the sim card to correct size? I used a punch, and use the outside piece when I need a regular size sim.
Anyway, when I travel, I keep a couple of modems on my sd card and flash them until I get the correct frequencies. Before I leave, I save a screenshot of the APN settings for the companies I anticpate using.
I'm in the UK on the Three network.
I recently purchased a Xiaomi Mi 6 (my current phone is an Mi 4) from Hong Kong Goldway. On booting it for the first time my sim does not seem to work with it. It shows 0 bars of signal, and says Emergency Calls Only.
I've not made any changes, and my sim works fine in other phones.
It's fresh out of the box, so no changes to MIUI, or to anything else. MIUI is at version 8.2 Stable, 8.2.2.0 (NCAMIEC). Android at 7.1.1 NMF26X.
I'd like it to work, but I also don't want to mess around with it too much if I need to return it!
Can anyone offer me help or advice?
How do I even return something to Hong Kong Goldway?!?
Have you tried it in the other sim slot?
Grab yourself a EE pay as you go for £1 and see if that picks up.
I have tried the other slot. Same problem.
Cheap sim is a great shout.
Updated to Global 8.5. Three sim still doesn't work.
Got a cheap EE sim, and it works in the phone. So I have a working Three sim (works in my Mi 4), a working phone (works with EE sim), but they will not work together. I've ordered a replacement Three sim just in case there's a strange issue.
Now the EE sim doesn't work anymore. It connected to EE, I received a welcome SMS and then it stopped working. I cannot make calls, or anything.
This is some odd behaviour I see:
https://imgur.com/a/sLxPX
Check out the top bar.
Between 1st and 2nd image I tuned on wifi/connected to my home wifi. It appears as if I am connected to a mobile network too. But I'm not. Still no calls/SMS/internet. Is this phone just broken?
Hiya, I'm using the Mi6 on ID mobile, they piggy back on Three, and I've not had any issues.
My phone came with the global ROM as well, and I've since gone onto the global beta. No probs.
I would say that the last few days there have been some network issues on Three around South West London, I'm having to turn mobile data off and on occasionally for it to actually connect. Though there's always been a 2G signal, so it doesn't sound related.
To be fair, once you've tried the replacement Three SIM, I can't see that it's anything other than the phone.
Fingers crossed!
Hello,
I just purchased an unlocked Note10+ N9750 Dual Sim in Taiwan, and I am currently located in Taiwan. The phone is on the latest SOFTWARE update from September 1st. ...ASI3.
When I put 2 Taiwanese SIM cards in the phone, the mobile internet works flawlessly and is extremely fast (About 200/50 on each network) when selecting SIM1 or SIM2 for mobile internet, with WiFi disabled. I can switch the cards and it works as expected.
The icons usually show 4G+, although it can sometimes slip into 4G for 10-20 seconds or so.
However, when putting my Tmobile SIM card into SIM1 or SIM2 along with a Taiwanese SIM card, and selecting the Taiwanese SIM card for mobile DATA (The goal here is to use the Taiwanese SIM card for data when in Taiwan), the mobile data is extremely slow (Around 2/0.5).
Furthermore, most of the time, when trying to access the internet, it appears that the phone is trying to connect for the first 5-10 seconds before actually bringing back internet data.
This can be with an app, like Whatsapp, or a simple Google search, or a speed test.
The icons will show 4G+ or 4G, not sure there is a pattern here.
I have tried everything I could think of with roaming ON/OFF, moving the SIM cards around, etc.
APN for Tmobile is correct and setup for IPV4/6 for normal, and IPV4 for roaming.
Again, if I simply replace the Tmobile SIM card with another Taiwanese provider (2 Taiwanese SIM cards installed), the internet is super fast and instantaneous on either SIM card.
The Tmobile SIM is working as expected in a Note9 TMobile Single SIM.
Not sure if anybody has some insight on what may be going on here...
Coming from a Note9 and the Tmobile SIM is less than 1 year old if I recall.
Thank you.
I forgot to mention that if I go into the SIM DEVICE MANAGER with both a Taiwanese SIM card and the TMOBILE SIM card installed and disable the TMOBILE SIM, the internet works fast as expected on the Taiwanese SIM.
As soon as I re-enable the TMOBILE SIM card, the internet is slow again and takes 5-10 seconds before bringing data back from a Google search, etc...
That's because if you are overseas with T-Mobile it caps data speeds I believe at 256kpbs.
I'm guessing the order of the Sim somehow maybe coming into play . Also generally second sim position will give you Lower speeds
Hello Joogle,
I should have mentioned that I have the 15GB pass from Tmobile, so 4G speeds while roaming up to 15GB. The speed when on the Tmobile card is very fast, 50/10 or so.
This is not the issue I believe.
Does 2nd position really give slower speeds? I did not know that.
Interestingly, I am in China at the moment and put a Hong Kong SIM card in slot #2 with my TMOBILE SIM in slot#1. Selected sim#2 for data, and everything works great and is always fast.
Not sure what to make out of that.
Preferred Network is set to: LET/TD-SCDMA/UMTS.
A bit confused by all the options of 4G SWITCHER.
Well, I found out that if I put my TMOBILE SIM in 3G/2G mode only, and leave the Taiwan SIM card at 4G/3G/2G, everything works great and fast with no delay...
This is fine since 3G is good enough for phone calls and text messages.