The iPhone 5 production is looking like it's moving into overdrive as manufacturer Foxconn is said to be producing 150,000 units a day, according to a report from Taiwan's DigiTimes.

The Taiwanese news source reported that lens maker Largan Precision, touch panel maker TPK Holding, reinforced glass supplier G-Tech Optoelectronics and battery vendors Simplo and Dynapack are all currently operating at full swing for the production.

Shipments of iPhone 5s from the supply chain are expected to reach five to six million in September and top more than 22 million units in the fourth quarter as suppliers will ship less iPhone 4 and CDMA-version iPhones during the final quarter of the year, the sources told DigiTimes.

DigiTimes also reported that Pegatron Technology has reportedly landed about 15 percent of iPhone 5 orders from Apple, but the company may not begin shipping until 2012.

If Apple is indeed stockpiling the iPhone 5, this is welcome news as it could be a sign that the iPhone maker is preparing for a massive release within the next few weeks.

Apple is expected to launch a fifth-generation iPhone and an updated fourth-generation model next month. The long-awaited phones could be available for sale by October

In the U.S., Best Buy employees have been informed that preorders for the iPhone 5 will begin this week in time for a release date the first week of October. Sprint is expected to carry the phone for the first time when it launches, a leaked report to BGR.com states.

Though Apple hasn't unveiled the iPhone 5 yet, German carrier Deutsche Telekom is reportedly already selling it.

Bloomberg reported on Monday that it confirmed with Deutsche Telekom that beginning this week, its subscribers may start reserving Apple's iPhone 5 smartphone.

Deutsche Telekom will hand out coupons to customers who make reservations for the device, even though the smartphone is yet to appear and there are only speculations about its release date.

Apple failed to launch the iPhone 5 this summer and is therefore under pressure to get it into the market in time for the holiday shopping season.

Also read: iPhone 5 Release Date: Sprint Internal Memo Confirms October Launch? [MEMO]