Install SP 3 on SQL Server 2008, where merge replication is running

Question

I have a SQL Server 2008 and I should install Service Pack 3 for it.

On my server there are several databases replicated, and mobile devices sync data via merge replication.

Can problems occur, if I install SP3, especially with my mobile devices (where SQL CE 3.5 is running).

I can't update all of the mobile devices.