Gather As Many "Unidentified Numbers" As Possible From Their Phone

Their cell phone will be the best place for "evidence" and so it's essential that you search it for any numbers that your partner keeps calling / messaging.

Just look through their incoming / outgoing calls, text messages and address book, noting down all the numbers you don't know or look suspicious.

Find Who Owns Each Number

Using the list you made of the numbers you don't know, perform a reverse phone lookup on each number. This will bring back information including full name, address, line details, carrier information and further background information.

It's best to use a reputable company for this type of lookup and paying for information is a good sign of this. This is because by paying, you a guaranteed that the information you get is correct and up to date. If you're unsure of what service is best, please use our recommended service.

Take Further Action

After finding the owners of the numbers, you need to then use the information you've gathered and either confront your partner or investigate further.

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