(Bloomberg) -- Amazon.com Inc. has been talking with wireless carriers about offering low-cost or possibly free nationwide mobile phone service to Prime subscribers, according to people familiar with the situation.

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The company is negotiating with Verizon Communications Inc., T-Mobile US Inc. and Dish Network Corp. to get the lowest possible wholesale prices. That would let it offer Prime members wireless plans for $10 a month or possibly for free and bolster loyalty among its biggest spending customers, the people said, who requested anonymity to discuss a private matter.

The talks have been going on for six to eight weeks and have also included AT&T Inc. at times, but the plan may take several more months to launch and could be scrapped, one person said.

Dish shares jumped 18% Friday in New York since a deal with the retail giant could help the struggling satellite-TV company as it transitions to become a national wireless carrier. Meanwhile, T-Mobile fell 7.6%, AT&T dropped 3.8% and Verizon slid 3.5.%. The big three national carriers could see their own subscribers flee to a cheaper option at Amazon. Deutsche Telekom AG, which holds a majority stake in T-Mobile, fell 9.1% in Germany.

“We are always exploring adding even more benefits for Prime members, but don’t have plans to add wireless at this time,” Amazon spokesperson Maggie Sivon said in a statement.

T-Mobile, AT&T and Verizon all said they were not currently in discussions with Amazon about wireless service. Dish declined to comment.

Amazon’s US Prime subscribers pay $139 a year for privileges like speedy free delivery, video streaming and access to 100 million songs. Analysts say Prime membership has stagnated in the country since Amazon boosted the annual price from $119, a sign that a subscription is less attractive to consumers struggling with a stubbornly high inflation rate. About 167 million Amazon shoppers had Prime memberships as of March, unchanged from a year earlier, according to Consumer Intelligence Research Partners.