Why go through the motions of fading? If you both no longer wish to be JWs, don't continue attending.
If you are actually moving, another option would be to attend your current congregation one last time, but tell the elders you are moving to another location from where you actually will be going. You could request they send your records to a congregation in the fake location.
Attend the fake congregation a few times to pretend you have moved there, but right away ask they request your records from your prior congregation. Let-on that you are currently living at a temporary location so until your permanent residence is settled, you can't provide an address. Within a month, your records should arrive but as you are not well known, once you stop attending, they will likely forget about you and what you look like.
Change your mobile numbers to stop the texts, and be choosy about who you provide those numbers to.
If you have JW family remaining in your current congregation, there always remains a potential the elders will mention your new congregation, or will ask your family member for your contact information. Any good JW will submit to an elder's request, even if you request/demand that your contact info is not to be shared with anyone.