Sprint unveiled an offering of $1.5 billion in senior notes, which would be used for “network expansion and modernisation”.

Sprint mentioned “general corporate purposes” as another target for the funds, but network improvement seems a priority.

Earlier this month, RootMetrics, an analyst research company, published a report after conducting tests on each US nationwide mobile network during the six months to 31 December 2014.

Sprint finished last with an overall ‘RootScore’ of 167, leaving it far behind Verizon Wireless (799) and AT&T (493). T-Mobile US scored 205.

The authors noted, however, that the “biggest improvement stories” belonged to T-Mobile US and “especially Sprint”. Sprint’s network, however, still falls some way behind rivals when it comes to speed.

In early February, Sprint wrote down the value of its brand and wireline network assets to the tune of $2.1 billion, with Marcelo Claure, CEO, admitting that his turnaround plan still had “a long way to go”.

The sale of the 7.625% notes, which are underwritten, is expected to close on 24 February and are due 2025.