Is it permissible for a telecommunications services company in a country where there are no non-usurious banks to offer a direct selling service via mobile phone that requires electronic linking and coordination with usurious banks, and to place the company's equipment inside the banks' premises to complete the transfer of funds from the buyer's account to the company's or seller's account, knowing that these banks do not offer usurious interest on current accounts? And what needs to be modified for this service to be permissible according to Sharia?

It is permissible to accept a check from a Riba-based bank, because this is for the purpose of fulfilling a right and not an elective engagement in a Riba-based transaction. It is also permissible for a company to deal with Riba-based banks in permissible transactions when there is a need, such as transferring amounts to customer accounts, or opening an account without interest if no Islamic banks are available that serve the purpose. Consequently, it is permissible to place company equipment and devices in the bank, and similar necessary technical and service procedures.