I have used the Dolphin mobile services before and had experienced plenty of trouble thanks to it's poor networking strength. There's never been any stability of it's network and often got disconnected for simplest of reasons. The charges are competitive though and gave decent value for money. The data packs were good but got ruined by it's poor network. They had a decent coverage in our city but don't have there own towers and I think that's the main source of there problems. Dolphin customer care service representative were often polite but had little understanding of it's problems.