Why use an eSIM in Egypt?
Between the Cairo (CAI) arrivals hall and the Giza plateau there are a dozen moments when data saves you money and an argument: booking an Uber or Careem instead of negotiating at the taxi rank, checking the metro to Tahrir, translating a menu in Khan el-Khalili, and buying a timed ticket for the Grand Egyptian Museum. Down the Nile and out on the Red Sea the pattern repeats on a smaller scale.
Egyptian operators sell tourist SIMs at the airports, and every sale is registered against your passport. That is straightforward at Cairo and slower at Hurghada (HRG) or Sharm El Sheikh (SSH) when a whole charter flight arrives at once. Home-carrier roaming into Egypt is generally priced by the day, which suits a weekend and not a ten-day Cairo, Luxor and Aswan itinerary.
An eSIM for Egypt is installed before you fly and connects to a partner network as soon as the phone finds a signal on the tarmac, with your home SIM kept for calls and OTPs. See the plans above for sizes and validity.

