Those who've snooped through their other half's phone without permission could well have been breaking the law without even realising it.
Partners who have grown suspicious of each other have been warned by phone experts that checking each other's private phones without asking first could see them fall foul of UK legislation that prohibits certain types of electronic eavesdropping.
This advice comes after research found that nearly three-quarters (71 per cent) of those in relationships had indeed used their partner’s phone without their knowledge, while more than half (51 per cent) confessed to having checked their significant other's messages.