In general, it's a good idea to have cash reserves as backup in case of any issues down the road. (credibly.com)
There were self service check - in desks which were very easy to use and lots of staff on hand in case of any issues. (mummymummymum.com)
Some Shopkeepers are so confident with Vivo after sales services that they are offering customers option to drop their handset in case of issues at their shop, the shopkeeper will then send to Vivo service center and collect, then the customer can collect from their shop. (gogi.in)