TeamViewer on iPhone not connecting over mobile data on the T-Mobile network

I used it last night at my house on my wifi network and it worked fine. I just tried it right now over mobile data on the T-Mobile network and it is not working. When I try to sign in, I get the message "sign in failed. Please check your internet connection". Obviously my internet is working just fine....

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Accepted answers

Julia

Hi all,

Can you please try it again to see if it works now? In which country are you located and which provider are you using?

Julia

Hi all,

Can you please contact your ISP to make sure that *.teamviewer.com is available from the mobile network? And can you please also try to make a hotspot with your mobile device and try a connection from the computer when the computer is connected to the hotspot?

All comments

Julia

Hi all,

Can you please try it again to see if it works now? In which country are you located and which provider are you using?

Julia

Hi all,

acot

Hey everyone, everythings been working for me all weekend and today over LTE.

How about the rest of you? we all fixed?

wsloan

It is working for me on LTE as well.

A big thanks for whom ever got that fixed!!!

sbertram

Working again for me

@acot wrote:
Hey everyone, everythings been working for me all weekend and today over LTE.
How about the rest of you? we all fixed?

acot

I have the same issue as this customer.

Im on t-mobile. i am from chicagoland area. I have an iphone 7 plus. I have version 12.1.76106 CL of the IOS App for Teamviewer. I am on IOS version 10.2.1. I am using LTE wireless data (this seems to be important) My hotspot is not on.

Here is what I have troubleshot so far.

This all started after that last server downtime/update teamviewer announced. (not saying thats cause, just that it started after that) Teamviewer has always worked for me on my current phone, current, IOS, and current carrier before. I cannot confirm if I have the same Teamviewer Build that it worked on as my phone auto updated IOS apps.

When I try to log into my account over wireless LTE I see "Operation Failed. Please check your internet connection and try again"

If I try over Wifi it works.

If i turn off LTE in settings > Cellular > Cellular Data Options > Enable LTE > Off and force 4G everything works.

If I gain an active connection to a remote PC through the app over wifi or 4G and then switch my phone back to LTE the connection stays active and I am able to manipulate the remote PC without any time out.

If I close the connection (that i activated over wifi/4g and swapped over to LTE) then it brings me back to a blank blue computers screen in the teamviewer app.

I can turn off my phone or go on airplane and back or close the app or double tap home and slide the app up close. none of that matters when i go back onto the teamviewer app over LTE I will get a blue window with nothing on it on the computers tab of the teamviewer app.

If i go to settings and sign out. I will then see the normal login page on the Computers tab but when i enter my credentials i get, as stated above, "Operation Failed. Please check your internet connection and try again"

I am a Tech Advisor for a software company that troubleshoots high level excalated calls all day. I would be happy to help in any way with figureing this out.

In the mean time, i can still switch my phone over to 4G and everything works when I need to connect in a pinch but obviously this is not ideal.

saleemkawar

Hello,

Thanks for the update; it looks like it's finally working for me with the T-Mobile network in the Los Angeles county area

I still have to try using teamviewer on a device that's connected via hotspot, but I'm sure it'll be fine now. Thanks again.

Julia

Hi all,

The issue should be fixed - I could already read, that most of you do not have the problem anymore.

Is here someone who still has problems with the connection?

Anovil

Working here as well!

Thank you.

Sakamano3000

I'm on Android and on Tmobile. Teamviewer hasn't worked properly since about 2 weeks ago or so.

Please work with Tmobile to get your software working on their network again. Thank you.

jameskeeling

My Teamviewer has stopped working from my Android device over T-Mobile within the past several days/weeks. Works alright if I disable data and rely solely on Wi-FI.

Anovil

Same issue here:

iPhone 7 with T-Mobile, in Chicago.

Doesn't work on LTE, but works on WiFi.

Disabling LTE doesn't seem to work for me.

Logs show multiple timeouts (first occurence is to master2.teamviewer.com:5938)

This is quite upsetting. Please fix.

jwxx

It seems to fix the problem on my Tmobile s7 edege after apply "reset to default" under Access Point Names.

wsloan

I spoke with a TMobil engineer and they claim the issue is that TeamViewer needs to update thier app so that it can be accessed via IPV6.

So if this is correct, when will this update take place? If this is not correct, how can we solve this problem? Can you confirm if Verizon customers are accessing teamviewr over thier LTE network?

Sakamano3000

As I feel it is not my responsibility to fix your program's issue, I will not be contacting TMobile. I will wait for TeamViewer to press the issue further with TMobile to resolve this problem.

acot

I got a private message from staff member Julia on this thread saying that some people have gotten it fixed by calling T-Mobile. Except she didn't tell me how or what to say. Maybe tell me a port range that needs to be open?
I called T-Mobile and they don't know what I'm talking about.

acot

If any of you have iphones (not sure if you can do this on android) can you try switching to 4g and trying it like I did.

Over LTE Teamviewer does not work, but over 4G it does. SO obviously the T-Mobile cellular network works.

Its something about Teamviewer trying to connect over LTE

Here are my instrctions from above:

If i turn off LTE in settings > Cellular > Cellular Data Options > Enable LTE > Off and force 4G everything works.

wsloan

I am in Chicago. Teamviewer is not working on T Mobil network. I spoke with T Mobil and they said it should work over thier network. They instructed me to ask the app developer if they are restricting cellular data and making the app only work over WiFi?

compdepo

Using Samsung Galaxy note 5, note 3, and s7 edge. Non of them work as well on tmobile data. I tried **Third Party Product** and **Third Party Product** works fine.

Borgholio

Just wanted to add my 2 cents that it's not working for me either. The workaround of turning off LTE does indeed work, as does going to WiFi. It just doesn't work on T-mobile LTE.

Jmeans2323

Hello. Just read thru all threads and I am still having the same problem. I am on T-Mobile and have a Samsung S8+.

randall

It worked for a few weeks on T-Mobile in the Los Angeles area for me but then stopped working again about the end of June 2017 and still isn't working as of now (end of July 2017). The app just keeps trying to connect to partner if on cellular network, but on wifi it works just fine. Is there a solution to this or what was changed since May 2017 that has caused it to crash again?

randall

The issue was resolved temporarily for May 2017, but it is not working on cellular network for those of us on T-Mobile once again as of about the end of June 2017. Can you look into what you did in May to get it working?

elfuego

Julia,

This issue is still ongoing. I just got off the phone with T-mobile support and they have confirmed that *.Teamviewer.com is whitelisted. The issue first appeared for me when I got my new Galaxy S8 so I thought it was a device issue. However when I saw that it was happening for both Android and IOS, I knew this was something bigger. Here are the troubleshooting steps I've taken:

Uninstalled/reinstalled the application
Reviewed and granted the teamviewer app all permissions it can possibly have
Disabled/Enabled 4G/LTE
Verified that I can access teamviewer.com and master12.teamviewer.com within my S8 browser.

Lastly I emailed a copy of the event log from my phone to support@teamviewer.com. Please have your developers review this. The app keeps stating to check the Internet connection but the teamviewer app is the only application I have installed that can't seem to detect the mobile network.

elfuego

Just to follow-up on this situation. I contacted both Teamviewer and Tmobile. The application logs state that Tmobile is blocking port 5938 which was confirmed by Teamviewer support. I passed this information along to Tmobile and they escalated it with a ticket. However I receive a voicemail 2 days ago stating they would not be unblocking the port with no explanation as to why it was blocked in the first place.

I don't know how many people on Tmobile use Teamviewer but unless a large number of people start screaming, the app will become almost useless. :manmad:

alinajetly

I fixed my problem by cellular data not working for my iPhone , because I moved to Fido before a week. I found a online guide about the cellular data not working and it worked for me.

Source: https://www.howtoisolve.com/fix-iphone-cellular-data-not-working/

arthurnas

Teamviewer doesn't work for Android too (over t-mobile). It only doesn't connect when running over 4 LTE. The solution is to get rid of 4G LTE connection.
I did change the network connection settings to connect only to 3G-4G connection. Worked fine.

sankafola

in setting you need to put data for teamviewer ON

ONTIME

Hi, This solution is for the users who are using teamviewer in windows OS.
1. Open up teamviewer, click on 'Connection' link in the, then click on 'Exit Team Viewer'
2. Click windows key on keyboard and type 'Services'
3. In services window, search for 'TeamViewer' and double clik on 'TeamViewer'.
4. Click on 'Stop' button.
5. Now, click on windows key in the keyboard and type 'Team Viewer' and open it. Now, you will be able to connect without any issues

kash

I'm using Tmobile and it was working fine before on Tmobile but now I've to use wi-fi everytime I need to connect to my laptop at home. I tried both from Andriod and iOS devices.

I live in Chicago, IL and using the same laptop and T-Mobile from the same location.

This is the msge I get everytime I try to connect directly "A connection could not be established please check your internet connection". My data on my phone working greate.

Please help!