An improvised explosive device detonated early Sunday in Egypt's Nile Delta Menoufiya governorate, Al-Ahram Arabic news website reported.
The blast apparently targeted a Vodafone shop in Shebein El-Koum city. A recent wave of attacks have targeted mobile network provider stores.
No casualties were reported as a result of the bomb.
Last week five improvised bombs, planted beneath cars, exploded in Cairo's working class Matariya district, also near Vodafone and Mobinil shops, destroying the two store facades in addition to others nearby.
Similarly, three bombs exploded on 26 February in greater Cairo's Mohandiseen area, targeting two Vodafone and one Etisalat stores.
Egypt has been facing a decade-long Islamist insurgency in the Sinai Peninsula, which spiked after the ouster of Islamist President Mohamed Morsi in July 2013.
Militants have repeatedly attacked police and army sites and personnel in Sinai as well as other parts of the country, leaving hundreds dead and injured.
In recent months, militants have increasingly attacked economic targets in urban areas, such as electricity pylons and mobile-network stores.
Civilians have often fallen victim during various violent attacks.