So right now I’m using Y! Mobile and came across a UQ booth. They’re telling me if I switch over, the costs seem to basically be the same for my usage, but they’re also offering a Â¥20,000 voucher. They claim that there’s no catch and I can cancel whenever I want. I’m really tempted, but afraid I’m missing some catch. What stops me from jumping carriers every week collecting vouchers from all the carriers repeatedly? Should I switch this time??