It's a region where mobile technology is going through a major period of change, according to trade body the GSMA. More than 90 percent of the population were covered by 2G networks at the end of 2017, but more advanced networks are now beginning to take hold.
"Future growth opportunities will increasingly be concentrated in rural and low-ARPU (average revenue per user) markets, as well as younger demographic groups," the GSMA notes in its most recent report on the region.
"World Bank data indicates that around 40 percent of the population in the region is under the age of 16, a demographic segment that has significantly lower levels of mobile ownership than the population as a whole."
Other growth considerations include the cost of services for less affluent consumers and the volume of customers, about 50 percent, living in rural environments.
Here's what you need to know about the current and future mobile landscape in the region.
State of play: 10 key stats about mobile in Africa
Three-quarters of the population have a SIM connection. That translates to 747 million people.
However, mobile subscriber penetration is just 44 percent, well behind a global average of 66 percent.
Despite this, with 444 million mobile subscribers, the region is home to nearly nine percent of all global mobile subscriptions.
Around a third of mobile users, 250 million, have a smartphone.
The number of mobile internet subscribers in Sub-Saharan Africa has quadrupled since the start of the decade. For many users it's the only way they can get online.
Mobile broadband is currently available to two-thirds of the regional population.
That means 400 million people in the region cannot access mobile broadband services at present, due to a lack of coverage.
Six new 4G networks launched in the first half of 2018. There are now 120 such networks in the region. New networks and cheaper smartphones are helping drive the transition to mobile broadband.
Getting online is expensive. Purchasing a handset and 500MB of data costs an average 10 percent of monthly income.
At the end of 2017, there were 135 live mobile money services found in 39 countries across the region, with 122 million active accounts.
Looking ahead: 10 predictions for 2025
As well as outlining current market data, the GSMA also set out how it expects the Sub-Saharan mobile ecosystem to evolve.
By 2025 mobile broadband will account for 87 percent of mobile connections. The current figure for these services is 38 percent.
3G will account for 60 percent of all mobile connections by 2025.
Nearly 300 million new subscribers are expected to access the mobile internet in the next seven years.
Active SIM connections are predicted to hit one billion in 2025, up from 747 million today.
Subscriber numbers are expected to account for half the population in 2023, rising to 52 percent in 2025.
By 2025 it's anticipated that 634 million people in the region will be mobile subscribers, up from 44 percent and 444 million people in 2017.
After witnessing aggressive subscriber growth in recent years, the adoption curve will slow to "half the level recorded over the preceding five years", the report notes.
However, at a CAGR of 4.8 percent for the period 2017-2022, the regional subscribe base will still be "more than double the global growth rate over the same period".
It's expected that there will be 690 million active smartphones in Sub-Saharan Africa. That's a growth of 440 million handsets in the next eight years.
Sub-Saharan Africa will be the last region to see 5G services launch, the GSMA predicts. It expects the first commercial 5G services to be launched in the region by 2021, with 12 million 5G connections, or about 2.6 percent of the total connection base, in 2025.
Unlocking mobile's potential: three key considerations
Although the picture painted by the GSMA is predominantly a positive one, the Sub-Saharan region will continue to lag behind others on key indices such as smartphone penetration and mobile subscriptions.
Nonetheless, the report highlights how MNO capex, mobile operator and start-up initiatives, as well as the rise of tech hubs in the region, are all playing a role in turning this potential into a reality.
On the issue of reaching rural audiences alone, the report notes: "For operators, revenue from rural sites is around a 10th of that for urban areas, owing to the low purchasing power of most rural dwellers, while backhaul, power and taxes account for up to 60 percent of the cost of providing mobile broadband in rural areas."
For mobile ambitions in the region to be realized, several critical factors need to continue to be addressed. Here are three of them:
1. Making mobile and mobile internet more affordable
A handset and 500MB of data costs 10 percent of an average monthly income, double the five percent threshold recommended by the UN Broadband Commission. Addressing this issue will therefore be essential for driving future growth.
Data and subscription packages that cater for less cash-rich consumers are one part of the equation. But, alongside that shift, making handsets cheaper for consumers will also help.
The cost of purchasing smartphones has dropped considerably in the past five years. As the report observes: "The average selling price of smartphones has fallen below $120 in most markets, with sub-$100 smartphones, mostly from Asian manufacturers such as Gionee and Tecno, now widely available across the region."
Government policies can also play a role in this area, driving digital inclusion and growing the digital economy in the process. In Ghana, proposals to remove customs duties of 20 percent on handsets and smartphones have been predicted to contribute to an additional three million handset purchases, with nearly one million of these being 3G-enabled devices.
Last year Google's CEO Sundar Pichai announced plans to train 100,000 software developers in Nigeria, Kenya, and South Africa, as well as creating in-person and online training packages designed to help 10 million people across the continent become more employable by developing their online skills.
Elsewhere, opportunities abound for governments in the region to offer more mobile-services -- including mobile payment services, as well as products and content in different languages.
The total value of mobile money transactions in Sub-Saharan Africa last year was worth $19.9bn, as individual transactions grew by 17.9 per cent to 1.2 billion year over year.
3. Incentivizing investment and expansion
Finally, given the cost of expanding service provision, stakeholders will also need to work together to do so in the most cost-effective manner possible.
Elements of this collaboration, such as infrastructure sharing, are already in place. We can expect to see more of this type of activity in the future.
Other considerations include: effective use of spectrum, including harnessing wavelengths currently being used for other services like analog TV, tax reform, and other policy levers designed to encourage operator investment.
The strategic investment of government funds to support training, local content provision, the move to m-government and improving mobile connectivity should also not be overlooked.
In 2017, for example, the Zimbabwean government approved a $250m project designed to improve mobile provision in rural areas, by funding more than 600 towers and base stations in areas with poor connectivity.
Given the size and scale of Sub-Saharan Africa, the evolution of the mobile landscape won't be consistent. Due to the cost and technical challenges of upgrading networks and reaching new consumers, stakeholders must work together if the region's mobile future is to be realized.
These joint efforts will require continued investment in infrastructure, content and skills, as mobile technologies continue to positively impact the lives of millions of people across the region.
There are already promising signs that this change is happening, but the size and scale of this challenge should not be underestimated.