SLT Digital Info Services announces improvements in SLT Rainbow MTC NEWS DESKJune 2, 2020, 1:27 pmJune 3, 2020 Comments Off on SLT Digital Info Services announces improvements in SLT Rainbow The Digital Marketing and Directory Information arm of Sri Lanka Telecom PLC (SLT), the SLT Digital Previous ArticleSLT Digital Info Services announces improvements in SLT Rainbow Pages