Exhibit 99.5

T-MOBILE US, INC.
FORM OF BENEFICIAL
HOLDER ELECTION FORM

The undersigned acknowledge(s) receipt of your letter and the enclosed materials referred to therein relating to the offering of shares of common stock, par value $0.00001 per share (the “common stock”), of T-Mobile US, Inc., a Delaware corporation (the “Company”). Capitalized terms used herein and not otherwise defined herein shall have the respective meanings given to such terms in the Prospectus Supplement, dated June 23, 2020 (together with the accompanying prospectus, the “Prospectus”).

With respect to any instructions to exercise (or not to exercise) rights, the undersigned acknowledges that this form must be completed and returned in sufficient time to allow us to process your request and submit your instructions to the subscription agent by 5:00 p.m., Eastern Time, on July 27, 2020, the scheduled expiration date of the rights offering (which may be extended by the Company).

This form will instruct you whether to exercise rights to purchase shares of the Company’s common stock distributed with respect to the shares of the Company’s common stock held by you for the account of the undersigned, pursuant to the terms and subject to the conditions set forth in the Prospectus and the related “Instructions for Use of T-Mobile US, Inc. Subscription Rights Certificates”.

Box 1. ☐ Please DO NOT EXERCISE RIGHTS for shares of common stock.

Box 2. ☐ Please EXERCISE RIGHTS for shares of common stock as set forth below.

The number of rights for which the undersigned gives instructions for exercise under the basic subscription right should not exceed the number of rights that the undersigned is entitled to exercise. The undersigned is only entitled to the over-subscription right if the undersigned exercises its basic subscription right in full.

Basic subscription right:

$103.00

(Line 1)

Over-subscription right:

$103.00

(Line 2)

Total Payment Required:

(Sum of Lines 1 and 2 must equal total of amounts in Boxes 3 and 4.)

Box 3. ☐ Payment in the following amount is enclosed: $

Box 4. ☐ Please deduct payment from the following account maintained by you as follows:


Type of Account			Account No.

Amount to be deducted:			$

			Signature(s)

			Please type or print name(s) below:

Date: _____________, 2020