Cannot delete sim contacts!

I've been trying to delete the useless contacts on my device but after a restart, they keep reappearing! I tried clearing data on the contacts and calling screen. The contacts aren't synced also or linked to any accounts. Help pls

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I've been trying to delete the useless contacts on my device but after a restart, they keep reappearing! I tried clearing data on the contacts and calling screen. The contacts aren't synced also or linked to any accounts. Help pls

from xda-developers http://ift.tt/2c76cE0
via IFTTT