The Foreign Affairs Minister says his phone was used to contact some of his fellow EU counterparts after it was hacked last year.
Simon Coveney says the matter was dealt with swiftly and the hack led to him being more careful about the security of his texts.
The chairman of the Foreign Affairs Committee said he still had questions to answer over his deleted messages about the Katherine Zappone UN appointment.
Minister Coveney's written to Charlie Flanagan to insist any suggestion he was trying to keep his texts to the Tanaiste secret are "plain wrong".
Speaking earlier, Leo Varadkar said he believes he still has the support of his Government colleagues:
A local Sinn Fein TD says the current government is "incapable" of making decisions in the best interests of Irish people.
Matt Carthy says Minister Coveney must return to the Foreign Affairs Committee and explain his position.
He added that the Tanaiste needs to be "more humble" and that he can't "always point the finger at others"
Deputy Carthy told Northern Sound that the government isn't being led by the national interest.
