Lenovo — Smartphone with sleep screen

Address:

632403

I purchased a Lenovo A 6000 from a shop with 1 year warranty.After 15 days of purchase I found the phone becoming irresponsive.I rushed to their authorised service centre at Anna salai, Chennai where they updated the software and resolved the issue.After 3 weeks the problem recurred.Again I visited the same place and showed my dissatisfaction and they updated the software again.I have been chatting and speaking to their call centre and have been informing these difficulties.Now I wanted them to replace the phone.They were not agreed.The problem again started after 2-3 weeks.I visited a service centre of Vellore, who said it had happened because of the adapter of Sim and asked me to change the sim after serviced.Airtel had no stock and they said that the sim with adapter has no problems so far.Again after few weeks the problem came and being serviced by the service centre.How many more times I need to rush to the service centres.