Reliance mobile locator is not a good Updater because its signal strength is very poor its Tower are very less and very less capable of signal strenth its offers are very cheap the signals are available only some areas where Tower strength are very high the expiry of SIM is very low only some sim card are capable to live a long time old sims like a sim 4year old are not working properly so I suggest you that before buying sim you have to ensure that signal strenth is good in your area you are living