According to the Azure Free Account FAQ, this is available internationally in all countries where Azure is commercially available (which includes 140 countries/regions). While this list does not include Somalia, it does include neighboring Ethiopia and Kenya. I would call the number in the FAQ to find out the best solution for those looking to use Azure in Somalia.
What if I still have questions? (About the free Azure account?)
1-855-270-0615
Azure Free Account FAQ:
https://azure.microsoft.com/en-us/free/free-account-faq/