AT&T has added integrator Tech Mahindra to its growing roster of cloud partners, with a multiyear deal worth a reported $1bn. This will see TechM taking over management of many of the telco’s back office systems as part of a move to modernize its 5G operations and transition to an entirely cloud-based IT and network environment. It will be responsible for moving the bulk of AT&T’s BSS/OSS systems to the Microsoft Azure cloud, following a deal, announced in July. AT&T has been evaluating its timescales and partners to migrate different elements of its network to the cloud, and at the same time, it has been assessing its external role in the cloud world, and the allies it requires to offer…