Is it permissible for a husband to divorce his wife in absentia for a year, then reconcile with her over the phone during her 'iddah, and not register the new marriage contract until after a year, and is he allowed to divorce his wife to get out of a crisis?

The question is ambiguous, and the purpose of the agreement is unclear, as is the contract that will be registered after one year if reconciliation occurs.

It is not permissible for a man to divorce his wife as a trick to achieve something he does not deserve.

A woman divorced with a revocable divorce has the same financial rights as a wife.

If a man divorces his wife out of necessity, his divorce is permissible, but if he divorces without necessity, his divorce is disliked (makrooh).

If a man divorces his wife with a revocable divorce and then takes her back during her waiting period (iddah), the reconciliation is valid, whether it is done by phone or otherwise, even if it is not registered in official courts.