Does engaging in sexual activity over the internet or phone lead to the loss of the houris in Paradise?

The forbidden relationship via phone or internet is not zina (fornication/adultery) that necessitates the Hadd punishment, but it is an abhorrent evil and a path to indecency. The Prophet, peace and blessings be upon him, called it the zina of the eye, ear, tongue, hand, and foot.

This act is not a cause for deprivation from the Hoor al-Ain in Paradise. Whoever repents sincerely from any sin, their repentance erases the sin, and one who repents from a sin is like one who has no sin. Repentance is by ceasing the act, feeling remorse, and resolving not to return to it, while observing concealment and not publicizing the sin.