Lost gps signal a few times

On my trip to Washington DC the app lost the signal a few times. It happened on a busy highway. Wasnt fun. Plus some places are not up to date, like Miami, FL and Washington DC. I like that it stores maps on my phone. I dont like that I cant add a stop to my route or alternate it. You re stuck with the route the app decided is the best. I want to compare a few routes before I start driving.

Aksbel about TomTom GO: Navigation, Maps, v1.1