Pre-orders for the iPhone XS and iPhone XS Max opened last night, and if you were hoping to score a new iPhone on launch day…well, let’s just say you should start lining up now. Delivery dates have already slipped to a month after launch for some models, and the trend is likely to keep getting worse.

Part of the cause for the rapid sell-out is that three of the four major wireless carriers are already offering unusually aggressive promotions on the new iPhones. Verizon and AT&T will both give you $700 off a second device if you buy two phones, and T-Mobile just announced that it’s offering the same deal.

Sprint, on the other hand, is offering a completely free 18-month lease with a qualifying trade-in, which means that iPhone 7 users could upgrade to a brand-new iPhone XS without actually spending any money.