I understand that the 29/01/2017 JBS completely cease to exist? what time is given to the transition to UBQ if the person is away from the computer and does not have access to the internet? sorry my english
Correct. It will no longer be supported by the developers.
On the 28th, before the genesis block for Ubiq is created, we will take a snapshot of the JBS blockchain at a certain block. Recording every balance of every address. Addresses that have been claimed, will receive their coins on launch. For addresses with balances greater than 0, that have not been claimed, we cant give to the owners as we dont know which UBQ address to send them to, so their coins will be put into a multisig wallet, and kept safe. If these addresses are claimed after the swap, they will receive their coins. We do not have a time restriction on this. People that miss the swap will not lose their coins as long as they can sign a message using the current JBS wallet, proving they own the address submitted.
So the UBQ wallet will be available on 28th at 12.00pm as I understand?
The network will launch at 12:00 PST. wallets will be available a little earlier, with a timestamp coded in preventing any valid blocks from being mined before the launch time. This is to ensure miners, nodes and various services have time to set up ahead of time.