Verizon Communications is planning the first public debt offering backed by smartphone installment plans, which is expected to be priced and sold in coming weeks. AT&T (T) and T-Mobile (TMUS) could follow, while Sprint’s (S) more difficult financial situation likely would make a public deal tougher to complete.

The moves are intended to raise cheap capital for the carriers, which are under pressure to keep spending to expand and improve their networks. They need tens of billions of dollars to pay for airwave licenses up for auction just this year. Bond investors like mutual funds and pension funds hope to buy securities with comparatively higher yields than other asset-backed debt that could also provide diversification benefits.

The bet is that the vast majority of smartphone buyers will keep paying what they owe, even if the economy weakens or they lose their jobs. Phone installment plans have only been around for a few years and no one knows for sure how consumers will behave in the next recession.

The opportunity arises because the big four U.S. wireless carriers, led initially by T-Mobile, have been weaning their customers off of subsidized phones and trying to get everyone to pay for phones in full—in return for somewhat lower monthly service charges. The deals include an offer to let customers pay for the phones, which often cost $650 or more, in 24 monthly installments.

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The shift, which now covers the vast majority of new phones sold, has helped improve the carriers’ profit margins while cutting into upgrade sales at phone makers, including Apple (AAPL) and Samsung. The carriers didn’t make a profit on the old, subsidized phone plans, so they’ve benefitted from shifting the expense onto customers directly. Now, customers have discovered that they can trim their monthly bills by holding onto phones for longer than two years.

But the carriers’ improved profitability comes at a price. They have to pay Apple and other phone makers the full price of each device up front while getting paid back over two years. Customers don’t pay interest on the installment plans. That eats into the cash the carriers have available for other needs. Similar to retailers and other businesses operating under similar conditions, the carriers are turning to the securitization market to get immediate cash for receivables from their equipment installment plans, or EIPs.

“This is becoming increasingly common,” says Marah Formanek, research associate at Jefferies. “Due to the working capital pressure from EIP uptake, we’re not surprised to see the carriers factoring their sizable equipment receivable balance.”

Verizon (VZ) declined to comment, but a spokesman pointed to remarks by CFO Fran Shammo during an investor conference earlier this month.

“We have been looking at, for over a year now, alternatives to really looking at ways to finance the handsets because I don’t want to be in the finance business,” Shammo said on June 7. After speaking with investors, the company believes it will be able to pay less interest on the public phone-backed securities than it paid on its private deals with banks, Shammo added.

Verizon’s move to sell public asset-backed securities follows a variety of similar, private arrangements that the company and other wireless carriers have struck with big banks. But selling public securities will be cheaper and improve Verizon’s financial position in the view of credit rating agencies, the company has said.

For details about Verizon’s recent labor settlement, watch:

As Verizon’s deal is then first of its kind, the terms may be less generous than on subsequent issues. The carrier is putting up future installment payments worth over $1.5 billion to back the less than $1.2 billion of bonds. For the $1 billion of the bonds that will get paid back before other tranches, that provides a cushion of over 30%.

Some of that cushion is needed to pay interest to bondholders, however, because customers on installment plans don’t pay anything extra beyond the price of a phone. Discounted for the interest, the receivables in the deal are worth about $1.4 billion, according to an analysis published this week by Fitch Ratings.

Securitization has generally worked as advertised, although mortgage-backed securities and related derivatives were at the heart of the financial crisis almost a decade ago.

But the phone-backed securities market will be tiny in comparison to the multi-trillion dollar mortgage market—Verizon says it plans to securitize about $2 billion per quarter. With monthly payments on the order of $30 and mobile service at risk, phone owners should be far more likely to stay current on their payment plans than overburdened homeowners at the height of the housing bubble.