Stuck on 1 bar in my San Diego home? What to do?

When we first started using T-Mobile their connection was pretty good on any given day and time, not anymore! The last month around 5:00 PM forward everything slows to a snails pace. Getting any type of connection is slim to none. Was about to call and complain, seek answers (again), but saw your post and decided to add my comments. Apparently the company has not been able to keep up with their promises and overwhelming customer base. Know many who have moved on to other companies and won't touch T-Mobile even if it was free. It's sad that things have literally gone down hill and no solve is in sight. I've called, communicated and spoken to various tech's and customer service rep's, all nice, but no remedy except waiting for answers that never come. I'm done trying, think it's time for new service.