The discounts, revealed in an internal sales memo obtained by TmoNews, will reportedly be announced on Wednesday and apply to device-only purchases of current iPhone models, as well as any back stock, including the iPhone 4, iPhone 4S, iPhone 5, iPhone 5c and iPhone 5s.
The memo fails to mention per model prices, however, meaning certain iPhones may not get the full $50 off. As noted by the publication, the qualifier "up to $50" suggests some variations or models may see less substantial out-the-door cost discounts .
If the discounts go live tomorrow, T-Mobile will be the latest to drop iPhone pricing ahead of Apple's expected "iPhone 6" release this fall. Last week, big-box retailer Walmart announced its own savings plan with a 90-day sale that drops 16GB iPhone 5c models down to 97 cents and 16GB iPhone 5s handsets to $79, with a two-year contract.
Earlier today, Verizon quietly initiated aggressive discounts on both iPhone 5c and 5s models in an apparent bid to run through inventory before Apple's anticipated announcement. Interestingly, the nation's largest carrier is burning through the 32GB iPhone 5c model without restocking, possibly hinting that Apple may discontinue the mid-tier version with the next release cycle.
Apple is said to be planning a special iPhone event for Sept. 9 that is expected to see the unveiling of a 4.7-inch iteration and possibly the debut of a 5.5-inch "phablet" variant.