[mobile-broadband-provider-info] sg/Starhub: Add USSD command to fetch balance info

[Thomas Haller <thaller src gnome org>]

commit 791e3c5cc5206934a1894e8ebaa78decb1500b04
Author: Guido Günther <agx sigxcpu org>
Date:   Sun Apr 5 19:21:20 2020 +0200

    sg/Starhub: Add USSD command to fetch balance info
    
    https://gitlab.gnome.org/GNOME/mobile-broadband-provider-info/-/merge_requests/13

 serviceproviders.xml | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/serviceproviders.xml b/serviceproviders.xml
index a4ebb25..771eb55 100644
--- a/serviceproviders.xml
+++ b/serviceproviders.xml
@@ -12057,6 +12057,9 @@ conceived.
                <name>Starhub</name>
                <gsm>
                        <network-id mcc="525" mnc="05"/>
+                       <balance-check>
+                               <ussd>*123*1*1#</ussd>
+                       </balance-check>
                        <apn value="shwap">
                                <plan type="postpaid"/>
                                <usage type="wap"/>