Your English is great 
I will try and give you some answers, but I have a couple to ask you also.
- Is your phone Android or iPhone or other
- is your Vivokey a Spark, Spark 2 or possibly a Flex One?
In an attempt to answer…
In the phone manufacturing world, there seems to have been some changes in this area which has affected the ability to unlock via NFC and also the protocol that they can read ( at least how well they can be read ) which is why I asked you about Spark (ISO15693) or Spark2 (ISO14443A), people are still struggling to find a solution which you can read up about in this forum, HERE are some search results for you to read through. and also THIS ONE in the Vivokey Forum.
I did, however, find THIS article, It looks promising, BUT
- It does say NFC wearable, but will be same for any NFC implant, including Sparks
- I have not tried it myself, so I cant confirm if it works, feel free to try it and let us know the results
- I don’t know how old / relevant it is
So at the moment, I think the answer is, your Spark ( NFC ) is capable of unlocking your phone, but currently not able to…
Short answer, NO
Longer answer, Have a read through the FAQs, specifically the “MRI testing up to 7T” basically a giant magnet doesn’t affect an implant, so a tiny one will not either.
But remember for safety to place your magnet AT LEAST 5mm away from your spark to prevent the chance of impact collision.
You use the word “near” this is obviously subjective, do you mean next to or just in the same area?
There are different reasons to put implants near other implants, BUT If you don’t “have” to place them “near” each other, that is your better option.
Where is your Vivokey placed? Where are you thinking of placing your magnet?
