Mobile SERPs showing wrong phone number on GMB

[LaurenHoward]

(I did contact Google support this morning for this issue and am waiting to hear back, but the client is very upset so is wanting answers ASAP, I figured I would ask you all if you've seen this before.)
Our client recently noticed that their GMB profile is displaying a wrong number, but ONLY in mobile SERPs. This number does not exist in the backend/GMB dashboard, on any of their ads, nor is their evidence of suggested edits changing the phone number.
We have been able to duplicate this issue on iPhones and androids- I personally get the wrong number 864-571-5256 when searching "waldrop sc" on my phone using safari and chrome, but when I search on the Google Maps app it shows the correct number (864) 740-8997. On desktop the correct number displays. The client did contact support on their own first and got a generic response telling him how to edit the phone number in the GMB dashboard which isn't the problem.

Waldrop Plumbing - Heating - Air​

331 S Hammett Rd, Greer, SC 29651
18647408997

Search on iPhone for "Waldrop SC" on Chrome app showing a random phone number 864-571-5256:

Search result on Google Maps app showing correct phone number (864) 740-8997:

 

[Stefan Somborac]

Hi Lauren,

I replied to this in the GMB support forum.

 

[LaurenHoward]

Hi Lauren,

I replied to this in the GMB support forum.

Thanks! Can you send me the link to the thread?

 

[Stefan Somborac]

Thanks! Can you send me the link to the thread?

Hi Lauren,

It's not posted under your name but all signals suggest it's the same case: Google My Business Phone Number Error - Google My Business Community

 

[LaurenHoward]

Hi Lauren,

It's not posted under your name but all signals suggest it's the same case: Google My Business Phone Number Error - Google My Business Community

Oh that is the business owner's account, they must have also reached out to support.