Integrated PCB antenna for A7670SA SimCom Module.

I have a project that I am looking for some assistance on. I am designing a small device that sends a notification via SMS when certain events happen. I am using the A7670SA module from SImCom. [login to view URL] I need assistance in designing the antenna for this module. We are targeting the NA market. The PCB is being designed in Altium Designer so a way of passing on the design either so I can implement it or it will need to be done by the hire. The frequency bands used by the device: Frequencies GSM850 DL 869 894MHz UL 824~849MHz EGSM900 DL 925~960MHz UL 880~915MHz DCS1800 DL 1805~1880MHz UL 1710~1785MHz PCS1900 DL 1850~1910MHz UL 1930~1990MHz E-UTRA 1 UL 1920~1980MHz DL 2110~2170MHz 2 UL 21850~1910MHz DL 1930~1990MHz 3 UL 1710~1785MHz DL 1805~1880MHz 4 UL 1710~1755MHz DL 2110~2155MHZ 5 UL 869～894MHz DL 824～849MHz 7 UL 2500~2570MHz DL 2620~2690MHz 8 UL 880~915MHz DL 925~960MHz 28 UL 703~748MHz DL 758~803MHz 66 UL 661710~1780MHz DL 2110~2180MHz Antenna Requirements: Direction: OmniDirectiona lGain: >-3dBi(Avg.) Impedance: 50Ω Efficiency: >50% [login to view URL]: 50W VSWR: <2 Isolation: 20dB is preferred Cable Insertion Loss: <1GHz<0.5dB Cable Insertion Loss 1GHz~2.2GHz: <0.9dB Cable Insertion Loss 2.3GHz~2.7GHz: <1.2dB