The Ecuadorian government will restore communications for Julian Assange at the country's embassy in London.
The Wikileaks founder was stopped from using the internet or a mobile phone in March because he had broken a 2017 promise not interfere in other countries' affairs while in the mission.
He used Twitter to challenge Britain's accusation that Russia had poisoned a Russian former double agent.
He also attacked the arrest of former Catalan president Carles Puigdemont over the failed independence bid.
Assange took refuge in the diplomatic mission in 2012 after a British judge ruled he should be extradited to Sweden to face allegations of sexual assault.
He claims the accusations were politically motivated and could lead to his extradition to the United States to face imprisonment over WikiLeaks' 2010 publication of secret US military and diplomatic documents.
Sweden has dropped its probe, but Britain says it still wants to arrest him for breaching bail conditions.