Lenovo service centers are very very disgusting.My friend got the problem with k4 note.It was perfect when my friend bought the phone but after couple of weeks mic stopped working and my friend went in a service center to it done, they kept my phone for 7 days.The problem was solved but then mic suddenly stopped working again.Again my friend went in a service center where my friend told them the problem and then again they asked me to keep the phone without telling me the maximum time that my friend have to wait to get my phone back.When my friend asked for a temporary phone they simply refused in a very unprofessional way.That’s by I must say lenovo phone and all the service centers are very disappointing.One should never buy a lenovo gadget.