Union Bank of India EAST SIKKIM GANGTOK Branch in SIKKIM Address & Phone Number can be used for contacting directly, which helps to identify the Exact Location of the Bank. Union Bank of India GANGTOK Branch EAST SIKKIM has many branches in SIKKIM. Address for Union Bank of India EAST SIKKIM in SIKKIM clearly shows the Address of Union Bank of India. In today's fast world, we need quick banking solutions to suit our lifestyle.