First of all see your current phone’s operating system are you satisfied or you need to change thisAfter setting this set a budget to ensure you never go over budgetThen see what you want are your needs from phone like some want better battery, some want better camera, some want better processor, some want better display for media consumption etcAfter this do some research on web there are many websites which give suggestions to buy phones filter them according to your needsLast step is to watch few review on YouTube which give you better understanding and features of the smartphone you are purchasingThen ensure the brand you are purchasing had a service center in your city and a well recognized brandImp- always while purchasing phone weather online or offline make sure you get authorized bill with same it will help you In many casesThese are the steps I follow everytime I purchase a phone I hope it will help you too