Internet access has become increasingly common in hotels, cafes and restaurants in large Egyptian cities, however the quality of connection differs. Many internet cafes can be found in the cities as well.
Make sure to enable data roaming on your mobile if you wish to use 3G/4G abroad, although the connection may be unreliable in smaller towns and rural areas.
Purchasing an Egyptian SIM card for the duration of your tour may be a cost-effective option. Your guide will be happy to advise on this.