As of October 21st, 350mb, 750mb , 1.5gb and 17gb monthly packages will no longer be available on the Airtel. Airtel made the announcement on their social media page.
#Airtees: Please note, that effective tomorrow 21st October 2016, the following bundles will not be available for purchase. This is in a bid to offer you more value. Dial *175# to select other alternative bundles.