Busy Signal when calling a forwarded number

Cellular callers get a busy signal or my T-Mobile voicemail when calling my forwarded AT&T landline number.  Started in December 2018.  AT&T said they have checked everything including my C.O. equipment.  T-Mobile can't find an issue.


I can forward my AT&T landline number to any other phone on my account or any other cellular company number, and there is no issue. 


Cellular callers only get a busy or Vm when calling my home and it's transferred to my cell.


The callers are calling from a cell phone.  If they call from a landline, I will get the call.


I have opened several tickets, but T-Mobile keeps closing them assuming the issue is resolved.


Any suggestions.  If you call from a landline to my landline, I get the call  If you call from a cell to my landline, you will get a busy or VM.

17 replies

Userlevel 6
Badge +14

That's no good, but we appreciate you testing out various solutions and giving us the rundown. Have you tried forwarding calls from a different number to your T-Mobile number? Like another AT&T number or T-Mobile number? We'd just like to see if this is happening with any number you forward or just the AT&T number.

yes Numbers trans to my cell have an issue. You get a Busy signal or my T-Mobile VM.  Talk to ATT this morning. They ran several tests no issue with my landline.  Said the issue is wit T-Mobile number. They have investigated on 3 separate occasion.   And I agree. Because  why does everyone get my T-Mobile voicemail  or busy  when they instead of my ATT VM If it’s an ATT PROBLEM.

Userlevel 6
Badge +14

I'm guessing you have a postpaid account, right? We'd have to continue with the ticket route and see what's in the engineering notes. When did you file your last ticket?

I pay my bill upon receipt. I don't have new ticket. Each on that is

opened, it is closed without any contact with me. I personally feel it

sits somewhere and when the ticket gets a little old, it is closed because

of age with the assumption that the issue is resolved. Much like your

email (We'd have to contnue with the ticket.............) No one is trying

to resolve this. No offense, but assuming you have access to my account,

why not look at my acct and the notes, dating back to December. I have

recited the same senario numerous times.

Userlevel 6
Badge +14

Unfortunately, I don't have access to your account so I can't see the ticket or update it. We're usually able to get a response from engineers 3 days after it was filed. Sorry I couldn't help more. I'm sure if we can get the latest ticket from our Care folks, we can use it as a guide to the next step for resolve this.

I don't have any open tickets. they are all closed.

I called T-mobile and they are unable to find the tickets.  LOL..Go


Userlevel 6
Badge +14

Geez, that's no good. Has anyone mentioned opening a new one? You can ask for it after it's been filed if it's not given to you first.

Userlevel 5

@xmommajacksonx​, I'm just checking in to see if you called Care to get a new ticket filed. As MC mentioned above, at this point, that's the next step to be taken so our engineering team can figure out why this is happening.

We are having the same issue except our landline carrier is Verizon. If you call the landline number from another land line call will get forwarded to cell. However if you call from any cell phone carrier to the main number it will not forward to the t-mobile number and you will get a busy signal. We do not use call forwarding through T- Mobile but through Verizon and needs to stay this way for the business. We are extremely disgusted and not getting the help we need. T-Mobile dismissed the other person on this thread saying AT&T was the problem however we have Verizon so the common denominator is T-Mobile wireless connection. Nothing is being done and getting disgusted explaining this over and over. Shocking that the supervisor I was transferred to just hung up on me and dismissed my concerns. I thought we were accidentally disconnected but he never called back and clearly hung up on me.I was begging him to read this thread so he could understand another person was having the same issue. He didn’t care just hung up. This has been going on since June 13th! No answers! We are losing money over this as the main number is our business line. What kind of customer service supervisor hangs up on a customer? They will just close out this ticket so I can start the process all over again with no solution. Hours on the phone, money lost and T-Mobile tech supervisor can’t be bothered and hangs up on me! Very disappointed

I totally agree.  This is a T-Mobile issue.  I have been trying since November to get this resolved.  The only other recourse I think we have is to put in a complaint with the FCC. I have been trying to avoid this.  But when I can carve out  some time, this will probably be my next course of action.  I have spent countless hours on the phone with T-Mobile, AT&T and Apple.  I have exchanged Phones, Phone types, sims card, reset my  phones to factory, reset network, so many times, it hurts to think about it.  I will not complete a survey because of this issue and issues concerning network connectivity, unable to text or receive texts. 

On a different  note.  I spent 4 hours with T-Mobile Saturday concerning connection issues, only to find out that there is no T-Mobile service in the area I was in (Brown Stadium in OH).  Someone at the location overheard my frustration of not being able to participate in the Activities (via txt) and told me that T-Mobile doesn't work at the Stadium.  90% of my group was T-Mobile and no one had service. (1 Verizon user had service)  I asked others that I know where there and they all confirmed that none of them have service when they are at the Stadium.  Some bought prepaids from other carriers in order to have service.  I am beginning to believe that the cost does not out way the service.  I said I would give it a year.  So I will.  But I believe I will be moving my 8 accounts and others I influence elsewhere.


There is a new ticket opened.  And I am pretty confident that it will be closed soon without resolution. Just like all the others.



I am having issues where when a call is made from a T-Mobile number to a Windstream ISDN provider and that number is forwarded to a T-Mobile number the caller gets a Busy signal. I have changed the forwarded number to 2 different T-Mobile numbers and the issue is still there. Who can resolve this?

I am getting the same issue.  When forwarding my work phone to my T-Mobile cell users who call me on work number get a busy signal.  I then forward my work phone to another number and and am able to receive the call on my Verizon cell phone.  Why can’t I forward to my T-Mobile cell?

I am having the same issue with forwarding my office landline to my T-Mobile phone. IT at work says it is a T-Mobile issue and T-Mobile says they don’t think it is and cannot do anything about it. It is imperative that I have this number forwarded to my cell phone so staff, clients, and outside callers can reach me.  

Maybe one day they will take this issue seriously and stop pointing fingers out and instead own this problem.