UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C.  20549	OMB APPROVAL
		OMB Number:	3235-0145
		Expires	February 28, 2009
		Estimated average burden
		hours per response	10.4

(Name of Issuer)

(Title of Class of Securities)

(CUSIP Number)

(Date of Event Which Requires Filing of this Statement)

	☐	Rule 13d-1(b)
	☐	Rule 13d-1(c)
	☒	Rule 13d-1(d)

	(a)	Name of Issuer  Sonim Technologies, Inc.
	(b)	Address of Issuer’s Principal Executive Offices  1875 S. Grant Street, Suite 750, San Mateo, CA, 94402

	(a)	Name of Person Filing The shares of the Common Stock reported as beneficially owned herein are held of record by Investec Investments (UK) Limited (“Investec”), an investment holding company registered in the UK.  Investec Bank plc (“Investec Bank”), the parent company of Investec, is a UK registered, authorized and regulated bank.
	(b)	Address of Principal Business Office or, if none, Residence.  The principal address of Investec and Investec Bank is 30 Gresham Street, London EC2V7QP, United Kingdom.
	(c)	Citizenship:  United Kingdom
	(d)	Title of Class of Securities: Common Stock, par value $0.001 per share
	(e)	CUSIP Number:     83548F101

	(a)	☐	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).
	(b)	☐	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).
	(c)	☐	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).
	(d)	☐	Investment company registered under section 8 of the Investment Company Act of 1940  (15 U.S.C 80a-8).
	(e)	☐	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E);
	(f)	☐	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F);
	(g)	☐	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
	(h)	☐	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
	(i)	☐	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
	(j)	☐	Group, in accordance with §240.13d-1(b)(1)(ii)(J).

	(a)	Amount beneficially owned:  1,409,124.
	(b)	Percent of class: 6.9%, based on 20,357,783 shares of common stock outstanding as of November 1, 2019, as reported in the Form 10-Q filed by the Issuer on November 12, 2019.
	(c)	Number of shares as to which the person has:

		(i)	Sole power to vote or to direct the vote _________.
		(ii)	Shared power to vote or to direct the vote 1,409,124
		(iii)	Sole power to dispose or to direct the disposition of _________.
		(iv)	Shared power to dispose or to direct the disposition of 1,409,124.

	INVESTEC INVESTMENTS (UK) LIMITED
	BY:	/s/ Andrew Nosworthy
	Signature
	Andrew Nosworthy
	NAME
	Authorized Signatory
	Title
	BY:	/s/ Andrew Neill
	Signature
	Andrew Neill
	NAME
	Authorized Signatory
	Title

	INVESTEC BANK PLC
	BY:	/s/ Andrew Nosworthy
	Signature
	Andrew Nosworthy
	NAME
	Authorized Signatory
	Title
	BY:	/s/ Andrew Neill
	Signature
	Andrew Neill
	NAME
	Authorized Signatory
	Title