San Francisco (CNN Business) How much would a 5G connection be worth to you? Verizon is hoping at least $10 more a month.

The carrier will start offering 5G service in parts of Chicago and Minneapolis on April 11, it announced in a statement on Wednesday. The service will be offered for free to Verizon customers for the first three months. After that it will cost them $10 a month more than 4G.

This is the year speedy 5G wireless networks come to the United States, and companies are clamoring for every advantage, from launching in new cities first to debuting 5G-compatible devices.

The 5G service Verizon is rolling out in these cities will only work on its Moto Z3 device and require a new attachment, which will snap onto the phone. Starting on Thursday, customers will be able to pre-order the $350 attachment for $50, though the company did not say how long it would offer it at the lower price.

Dan Hays, an adviser at PricewaterhouseCoopers' consulting firm, said $10 a month is right in line with what its research shows customers are willing to pay for premium wireless connections. Hays said he believes most people aren't willing to change the device they're currently using to another brand or model just because it has 5G.

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