Some mobile carriers offer services to track children/family/friends which will trace phone location through cell towers and notify of changes. Here's an example of [such service][1], so check if yours carrier offers these. You'll have to put your sim card into another phone and leave it at friend's place to fake your location. You can also setup call forwarding to your new sim if they decide to call and check.

  [1]: https://translate.google.com/translate?sl=ru&tl=en&u=https%3A%2F%2Fwww.mpoisk.ru%2Ffamily%2F