Image source: Getty Images Enter Your Email Address Rupert Hargreaves | Saturday, 27th March, 2021 | More on: VOD Over the past 12 months, the Vodafone (LSE: VOD) share price has increased 22%, excluding dividends to investors. However, despite this performance, I think the stock continues to look cheap.Long-term performanceThe Vodafone share price has increased in value substantially over the past 12 months, but its performance over the long term is much worse. Indeed, over the past five years, the value of the stock has fallen by 40%.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…Past performance should never be used as a guide to future potential. What’s more, just because the Vodafone share price looks cheap today compared to its past trading history doesn’t necessarily mean the stock is cheap. Still, when I look at the company’s fundamentals, I think the business is incredibly undervalued at current levels. The best way to value a telecommunications business is to look at its free cash flow. This gives us an idea of how much money the group generates from its operations after deducting capital spending. By comparison, profitability can be misleading because it doesn’t include money spent maintaining telecommunications equipment, although it does include depreciation. Vodafone is currently selling at a price-to-free-cash-flow ratio of 4.6. By comparison, the median valuation of telecommunications companies listed in the UK is 7. But Vodafone isn’t just a UK business. It has large international operations in Europe and Africa.As such, it makes sense to look at the valuations of its overseas peers. In Europe, the industry median price-to-free-cash-flow ratio is 6.7. The ratio of the company’s largest African peer, MTN Group, is 14.All of these figures suggest to me that the Vodafone share price is currently undervalued. It looks cheap compared to its peers in the UK and abroad. As well as the company’s low valuation, it also appears to support an attractive dividend yield of 5.8%. This yield is based on City forecasts and is by no means guaranteed. Nevertheless, I think it shows the organisation’s potential.Vodafone share price risksShares in the telecommunications giant appear cheap, but some investors might argue the stock is cheap for a reason.The organisation has a high level of debt and has to spend billions on spectrum rights to guarantee its positions in existing markets. These are the most significant risks to the company’s growth. It’s also facing heavy competition in some of its best growth markets, including Europe and India.The battle in India is so aggressive that the group has had to write down the value of its subsidiary there to zero. This shows just how much of an impact these contests for users could have on the firm. In the worst-case scenario, they could bankrupt the enterprise.However, I don’t think these challenges justify the 30%-or-so discount the Vodafone share price is currently trading at compared to the broader telecommunication sector.On that basis, I’d buy Vodafone for my portfolio today. Our 6 ‘Best Buys Now’ Shares The high-calibre small-cap stock flying under the City’s radar See all posts by Rupert Hargreaves I think the Vodafone share price still looks cheap Click here to claim your copy of this special investment report — and we’ll tell you the name of this Top Small-Cap Stock… free of charge! 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