Are the glorification (tasbih) and supplication (du'a) after the prescribed prayer invalid or deficient if a phone call is answered during them?

Translation:

Remembering Allah (Dhikr), glorifying Him (Tasbeeh), and supplicating (Du'a) carry immense reward at all times, whether it be after prayers or at any other time when the remembrance of Allah is prescribed. The casual speech that occurs during Dhikr does not diminish its reward, especially if it is out of necessity.