Zimbabwe's central bank on Wednesday eased a ban it had imposed two days earlier on cash transactions involving mobile money services.
Years of economic crisis have left the country short of banknotes and commercial banks have had to ration cash withdrawals.
As a result, many people use their cellphone to carry out electronic financial transactions -- and when they need cash, often go to the office of their mobile phone provider where they can get banknotes in exchange for a hefty commission.
On Monday the Reserve Bank of Zimbabwe shut down cash transfers via mobile money services.
It accused "some economic agents" of illegally exploiting the facility by charging exorbitant commissions -- often more than 40 percent.
But in a statement on Wednesday, the bank said it had boosted its monitoring mechanisms to prevent the "abuse of payment system" and had re-established the service.
However, it imposed a cap on the maximum cash withdrawal, at ZWL$100 (about US$6.6).
The country's largest mobile phone operator Econet, which has 10.5 million people using money transfer app, has challenged the directive in court.
The ban had affected millions of innocent customers "instead of identifying the abusers and dealing with them on a case-by-case basis," it said.
The ruling is expected on Friday.
President Emmerson Mnangagwa has promised to revive Zimbabwe's sickly economy.
But many people say they are worse off now under his government than under Robert Mugabe, whom he replaced in 2017.
Inflation reached nearly 300 percent in August, according to International Monetary Fund (IMF) figures, stoking fears of a return to the hyperinflation of 2009 that forced the country to ditch its own currency for the US dollar.