When I asked EE whether the new price plans were a response to poor uptake of 4G, I was told the company could not disclose any numbers, but had been "very pleased with the customer response to the launch of EE".

BBC: EE finds 4G a hard sell

There are two main types of US Savings Bonds: Series I and Series EE.

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Looking to purchase some Series I or Series EE Bonds?

FORBES: How to Find Low Risk, High Return Investments

If you cannot commit to a twenty year holding period, I would not recommend buying EE series savings bonds.

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Currently, Series EE Bonds and I Bonds qualify.

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Even on the train home from London where I was on 3G for the majority of the trip (but with 4G as I left London and arrived home in Edinburgh) EE was consistent and maintained coverage.

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Not a completely fair test - I had a six lane highway virtually to myself on EE's 4G while 3G networks are becoming congested - but an idea of what the future promises.

BBC: EE, 4G, BoJo, OMG