Can't Access Digital Voice app

[portlandboy]

I've been using the TT Digital Voice app for quite a while without any issues.

This week a call was diverted from the landline, but only rang on my wife's phone, not on mine.

I tried to login to the app and it no longer allows me to access it. A message box appears stating:

Invalid SIM

Your account only supports SIM cards approved by Talk Talk Telecom Group PLC.

However, my wife and myself both use the same SIM cards (Spuzu) operating on the EE network, and have the same Samsung handsets. Her TT Digital Voice still works fine for incoming and outgoing diverts via the landline. 

I've already

• Uninstalled the app,
• Updated my phone OS,
• Turned the phone,off and back on,
• Reinstalled the Digital Voice app.,

None of this has had any effect on my ability to login to the app. The same message still prevents me getting to the Login page.

Any ideas of a fix please?

 

[KeithFrench]

I think that this app is being discontinued.