Verizon Wireless is continuing its efforts to pull back on customer promotions that lower the price of your next phone. After eliminating discounts for loyal customers renewing their contracts, introducing a $30 “upgrade fee” for each new phone activated on an account, and eliminating one-year contracts, the wireless carrier is ending its 20-month upgrade policy, requiring customers to complete a full two-years of service before they can get their next subsidized phone.

The change was a point of contention on Verizon’s quarterly earnings conference call, as investors fretted about dissatisfied customers already upset that the wireless industry relies on two-year contracts while phone manufacturers release coveted device upgrades at least annually.

The wireless industry is already under pressure from Wall Street, prepaid providers and T-Mobile to abandon the traditional ‘subsidized phone for a two-year contract’-business model in favor of no-contract, carrier-financed phones.

In response to that pressure, Verizon Wireless has also introduced a 12-month optional financing plan targeting early upgraders, those who have lost or damaged their phones, or customers trying to hang on to their grandfathered unlimited data plans.

Verizon Wireless introduces its 12-month financing plan for devices.

Under the plan, credit-qualified customers can finance devices starting at $349.99 for 12 equal installments (and a $2 monthly finance charge) charged to your Verizon Wireless bill (first payment due at time of purchase).

Customers can prepay a portion of their purchase upfront to cut the monthly payment — an important option for premiere smartphones like the Apple iPhone 5 ($650) and the Samsung Galaxy S3 ($600). Finance that iPhone and your Verizon Wireless bill will increase by $56.25 a month, including the finance charge, for the next year. You will still pay Verizon’s regular plan prices, which are artificially inflated to recoup a device subsidy customers are not getting under Verizon’s finance plan.

Verizon Wireless says the total owed balance cannot exceed $1,000 per customer, which makes it less useful for families (and even for those two-person households who want the latest and greatest). There is also a limit of two financed devices at any one time. But customers can pay off the plan balance early, which stops the $2 monthly finance charge and opens the door to finance something else.

Shammo

Verizon confirmed customers grandfathered on discontinued unlimited data plans can also take advantage of the financing offer and not lose their unlimited data service. Verizon earlier announced it would allow customers to keep those plans indefinitely, as long as they paid the full price for subsequent device upgrades.

A $30 upgrade fee still applies for each new device activated on your account.

Revenues at Verizon Wireless rose 8.6 percent to $16.7 billion in the last quarter, accounting for more than half of Verizon’s overall revenue. The company has received accolades from Wall Street for implementing its revenue-enhancing Share Everything plans, which have turned into a major money-maker for the wireless carrier, even though only 30 percent of existing Verizon Wireless customers have been enrolled in the new plans to date. Verizon expects to shepherd an increasing number of existing customers to the Share Everything plans in future quarters.

Verizon chief financial officer Fran Shammo said he does not expect much pushback from Verizon Wireless customers upset about the promotional cutbacks.

“We don’t anticipate a lot of dissatisfaction,” Shammo told investors. “We’re not seeing a lot of resistance here.”