There’s just 1 telecommunication provider in Ethiopia – Ethio Telecom.
Getting a local SIM is cheap and highly recommend for travel in Ethiopia.
SIM’s can be bought in the morning (Mon-Sat) from any Ethio Telecom shop in any major city.
Take your passport and some ETB to pay for the SIM, as well as to put credit on your phone via the voucher system used here.
Data, call and SMS packages can be bought on a daily, weekend, weekly or monthly basis by dialling *999# on your handset.
*804# can be dialled to check your balance.
Make sure to get your SIM registered (required by the government here) and your personal hotspot established.