Verizon's aggressive offers promoting adoption of more profitable smartphones delivers higher average revenue from every customer that is convinced to upgrade.

Verizon Wireless continues on its mission to seek out old customers, to explore new ways of earning more money from them, and going where other carriers have already  gone before to get customers to dump basic phones in favor of more profitable smartphones.

The company begins testing a new basic data plan on Thursday around the nation’s capital that will provide up to 300MB of smartphone data for $20 a month in an effort to reduce sticker shock for would-be upgraders confronting the smartphone fact-of-life: the mandatory smartphone data plan.

Curiously, Verizon is calling its limited promotion a “back to school” special, despite the fact some of the heaviest data users around are school age, likely to blow right past their usage allowance.

Verizon Wireless’ leaked press release:

Starting Thursday, existing Verizon Wireless customers in Maryland, Washington DC, Virginia and North Carolina will be able to add a 300 MB data plan to their smartphone or basic phone for just $20 monthly access when added to a voice plan. All new and existing customers are eligible for the promotional data plan that will be available from Aug. 18 through Sept. 30.

Customers in Maryland, Washington, DC, Virginia and North Carolina can choose from an array of 3G- and 4G LTE-enabled devices that include top sellers on all mobile operating systems including BlackBerry, Android, iOS, Palm and Windows Mobile. The plans are not restricted to specific phones but are geared to customers whose data use falls within the 300 MB allowance. Customers who go over their monthly allowance will automatically receive an additional 300 MB for an additional $20 per month.

If that doesn’t convince you to upgrade, perhaps Verizon’s version of “cash for clunkers” — a cell phone trade-in program, will.  Verizon Wireless is offering up to $100 for customers in their western region to trade-in basic phones for a shiny new smartphone, as long as they upgrade between Aug. 18-Sept. 30.

According to Phone Arena, some customers even under existing contracts may qualify:

• 1) Current customers with a basic phone that are eligible for a 2-year upgrade will have to purchase a new smartphone at the discounted upgrade price, re-sign a 2-year contract and add a smartphone data plan.
• 2) Current customers with a basic phone, but are still under a contract may be eligible for an early upgrade. If so, they purchase the new smartphone, re-sign a 2-year contract, and add a smartphone data plan.

Phone Arena had the benefit of a friendly Verizon Wireless employee willing to share the company’s employee-only documentation about the offer: