Editorial answer
Can I use one IPTV account on two televisions?
Only if the service permits the required number of simultaneous connections.
Only if the service permits the required number of simultaneous connections.
A practical check
Ask how many simultaneous plays the written offer allows. Two installed devices and two active streams are different. Try the second device with the first stopped before testing simultaneous viewing under an eligible plan.
Ask a follow-up
Include the exact device, app version, time of the issue and one thing you changed.